intel-wireless interview questions
Top intel-wireless frequently asked interview questions
How to setup an Access Point mode Wi-Fi Hotspot?
Point to be noted: Wireless hotspots aren't the same as ad hoc networks. There is significant difference between the two. In short, ad hoc networks aren't supported on newer devices and most Android, Windows Phone and Blackberry devices (and maybe iOS devices too) whereas AP mode Wi-Fi hotspots are. To get an idea about AP mode hotspots, ad hoc networks and their difference, refer to this Wikipedia page and this article on Connectify website.
Source: (StackOverflow)
I am getting this error as a part of this problem here but since this problem is totally different issue I think it is better to consider this issue separately. My wlan0 is down. When I try to turn it on with
$ sudo ifconfig wlan0 up
SIOCSIFFLAGS: Operation not possible due to RF-kill
and then
$ sudo rfkill list all
0: phy0: Wireless LAN
Soft blocked: yes
Hard blocked: no
1: tpacpi_bluetooth_sw: Bluetooth
Soft blocked: yes
Hard blocked: yes
What does the error msg mean? What is the RF-kill?
Hardware Specs
$ sudo lshw -class network
*-network
description: Ethernet interface
product: 82573L Gigabit Ethernet Controller
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:02:00.0
logical name: eth0
version: 00
serial: 00:16:d3:22:96:c2
capacity: 1Gbit/s
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=1.2.20-k2 firmware=0.5-1 latency=0 link=no multicast=yes port=twisted pair
resources: irq:44 memory:ee000000-ee01ffff ioport:2000(size=32)
*-network DISABLED
description: Wireless interface
product: PRO/Wireless 3945ABG [Golan] Network Connection
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlan0
version: 02
serial: 00:13:02:46:63:74
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwl3945 driverversion=2.6.38-11-generic firmware=15.32.2.9 latency=0 link=no multicast=yes wireless=IEEE 802.11abg
resources: irq:45 memory:edf00000-edf00fff
OS Version and Kernel Version
$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=11.04
DISTRIB_CODENAME=natty
DISTRIB_DESCRIPTION="Ubuntu 11.04"
$ uname -r
2.6.38-11-generic
[Update]
When I apply Fossfreedom's suggestion, I get "SIOCSIFFLAGS: No such device". The kernel is for some reason rejecting the card, as pointed by FF.
Dmesg after disabling and enabling wli3945, with Blocked WiFi
# modprobe -r iwl3945
# modprobe iwl3945
# dmesg|tail -n 50
[ 6835.430537] PM: resume of devices complete after 1889.701 msecs
[ 6835.430800] PM: resume devices took 1.888 seconds
[ 6835.430845] PM: Finishing wakeup.
[ 6835.430847] Restarting tasks ... done.
[ 6835.502666] video LNXVIDEO:00: Restoring backlight state
[ 6835.572203] [drm:drm_mode_getfb] *ERROR* invalid framebuffer id
[ 6835.852380] e1000e 0000:02:00.0: irq 46 for MSI/MSI-X
[ 6835.908162] e1000e 0000:02:00.0: irq 46 for MSI/MSI-X
[ 6835.908775] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 6836.919274] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=600
[ 6837.769253] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=600
[ 6859.097311] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=0
[ 6882.076501] e1000e 0000:02:00.0: irq 46 for MSI/MSI-X
[ 6882.132190] e1000e 0000:02:00.0: irq 46 for MSI/MSI-X
[ 6882.132924] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 6883.722633] e1000e: eth0 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
[ 6883.722645] e1000e 0000:02:00.0: eth0: 10/100 speed: disabling TSO
[ 6883.723071] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 6894.000044] eth0: no IPv6 routers present
[ 6896.551932] exe (2743): /proc/2743/oom_adj is deprecated, please use /proc/2743/oom_score_adj instead.
[ 8289.212078] usb 1-2: new high speed USB device using ehci_hcd and address 4
[ 8289.280270] hub 1-0:1.0: unable to enumerate USB device on port 2
[ 8289.608059] usb 1-2: new high speed USB device using ehci_hcd and address 5
[ 8291.006963] usb 1-2: USB disconnect, address 5
[ 8291.308072] usb 1-2: new high speed USB device using ehci_hcd and address 6
[ 8291.591228] usb 1-2: USB disconnect, address 6
[ 9598.556083] usb 1-2: new high speed USB device using ehci_hcd and address 7
[ 9599.059441] usb 1-2: USB disconnect, address 7
[11838.072332] iwl3945 0000:03:00.0: Master Disable Timed Out, 100 usec
[11838.072993] iwl3945 0000:03:00.0: PCI INT A disabled
[11850.210319] cfg80211: Calling CRDA to update world regulatory domain
[11850.218431] cfg80211: World regulatory domain updated:
[11850.218436] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[11850.218440] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[11850.218444] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[11850.218448] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[11850.218452] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[11850.218456] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[11850.291510] iwl3945: Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux, in-tree:s
[11850.291515] iwl3945: Copyright(c) 2003-2010 Intel Corporation
[11850.291601] iwl3945 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[11850.291624] iwl3945 0000:03:00.0: setting latency timer to 64
[11850.331841] iwl3945 0000:03:00.0: Tunable channels: 13 802.11bg, 23 802.11a channels
[11850.331847] iwl3945 0000:03:00.0: Detected Intel Wireless WiFi Link 3945ABG
[11850.332023] iwl3945 0000:03:00.0: irq 45 for MSI/MSI-X
[11850.332274] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
[11850.332436] ieee80211 phy0: Selected rate control algorithm 'iwl-3945-rs'
[11850.361710] iwl3945 0000:03:00.0: loaded firmware version 15.32.2.9
[11850.361885] iwl3945 0000:03:00.0: Radio disabled by HW RF Kill switch
[11850.365924] iwl3945 0000:03:00.0: Radio disabled by HW RF Kill switch
Dmesg with Unblocked WiFi
# rfkill list all
1: tpacpi_bluetooth_sw: Bluetooth
Soft blocked: no
Hard blocked: yes
2: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
# dmesg|tail -n 50
[ 27.649606] fb0: inteldrmfb frame buffer device
[ 27.649608] drm: registered panic notifier
[ 27.649815] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
[ 27.662754] HDA Intel 0000:00:1b.0: PCI INT B -> GSI 17 (level, low) -> IRQ 17
[ 27.662760] hda_intel: probe_mask set to 0x1 for device 17aa:2010
[ 27.662831] HDA Intel 0000:00:1b.0: irq 46 for MSI/MSI-X
[ 27.662868] HDA Intel 0000:00:1b.0: setting latency timer to 64
[ 27.769460] pcmcia_socket pcmcia_socket0: cs: IO port probe 0x100-0x3af: excluding 0x170-0x177 0x1f0-0x1f7 0x2f8-0x2ff 0x370-0x377
[ 27.774801] pcmcia_socket pcmcia_socket0: cs: IO port probe 0x3e0-0x4ff: excluding 0x3f0-0x3f7 0x4d0-0x4d7
[ 27.775742] pcmcia_socket pcmcia_socket0: cs: IO port probe 0x820-0x8ff: clean.
[ 27.788575] pcmcia_socket pcmcia_socket0: cs: IO port probe 0xc00-0xcf7: clean.
[ 27.789382] pcmcia_socket pcmcia_socket0: cs: memory probe 0x0c0000-0x0fffff: excluding 0xc0000-0xd3fff 0xdc000-0xfffff
[ 27.789466] pcmcia_socket pcmcia_socket0: cs: memory probe 0xa0000000-0xa0ffffff: clean.
[ 27.789547] pcmcia_socket pcmcia_socket0: cs: memory probe 0x60000000-0x60ffffff: excluding 0x60000000-0x60ffffff
[ 27.789632] pcmcia_socket pcmcia_socket0: cs: IO port probe 0xa00-0xaff: clean.
[ 27.813146] e1000e 0000:02:00.0: irq 44 for MSI/MSI-X
[ 27.868221] e1000e 0000:02:00.0: irq 44 for MSI/MSI-X
[ 27.868866] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 27.876620] IBM TrackPoint firmware: 0x0e, buttons: 3/3
[ 27.892982] input: TPPS/2 IBM TrackPoint as /devices/platform/i8042/serio1/input/input6
[ 28.121555] ppdev: user-space parallel port driver
[ 29.426589] e1000e: eth0 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
[ 29.426597] e1000e 0000:02:00.0: eth0: 10/100 speed: disabling TSO
[ 29.426893] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 31.009483] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=0
[ 34.474875] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=0
[ 40.160038] eth0: no IPv6 routers present
[ 7394.332227] exe (1666): /proc/1666/oom_adj is deprecated, please use /proc/1666/oom_score_adj instead.
[ 7587.420396] iwl3945 0000:03:00.0: PCI INT A disabled
[ 7599.728554] cfg80211: Calling CRDA to update world regulatory domain
[ 7599.736628] cfg80211: World regulatory domain updated:
[ 7599.736632] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 7599.736637] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 7599.736641] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 7599.736645] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 7599.736649] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 7599.736653] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 7599.797314] iwl3945: Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux, in-tree:s
[ 7599.797319] iwl3945: Copyright(c) 2003-2011 Intel Corporation
[ 7599.797397] iwl3945 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[ 7599.797419] iwl3945 0000:03:00.0: setting latency timer to 64
[ 7599.837714] iwl3945 0000:03:00.0: Tunable channels: 13 802.11bg, 23 802.11a channels
[ 7599.837719] iwl3945 0000:03:00.0: Detected Intel Wireless WiFi Link 3945ABG
[ 7599.837880] iwl3945 0000:03:00.0: irq 45 for MSI/MSI-X
[ 7599.838124] Registered led device: phy0-led
[ 7599.838170] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
[ 7599.838335] ieee80211 phy0: Selected rate control algorithm 'iwl-3945-rs'
[ 7599.980440] iwl3945 0000:03:00.0: loaded firmware version 15.32.2.9
[ 7599.980656] iwl3945 0000:03:00.0: Radio disabled by HW RF Kill switch
[ 7599.983562] iwl3945 0000:03:00.0: Radio disabled by HW RF Kill switch
Dmesg and Iwl3945 without Blocked WiFi
# modprobe -r iwl3945
# modprobe iwl3945
# dmesg| tail -n 50
[ 29.426597] e1000e 0000:02:00.0: eth0: 10/100 speed: disabling TSO
[ 29.426893] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 31.009483] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=0
[ 34.474875] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=0
[ 40.160038] eth0: no IPv6 routers present
[ 7394.332227] exe (1666): /proc/1666/oom_adj is deprecated, please use /proc/1666/oom_score_adj instead.
[ 7587.420396] iwl3945 0000:03:00.0: PCI INT A disabled
[ 7599.728554] cfg80211: Calling CRDA to update world regulatory domain
[ 7599.736628] cfg80211: World regulatory domain updated:
[ 7599.736632] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 7599.736637] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 7599.736641] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 7599.736645] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 7599.736649] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 7599.736653] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 7599.797314] iwl3945: Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux, in-tree:s
[ 7599.797319] iwl3945: Copyright(c) 2003-2011 Intel Corporation
[ 7599.797397] iwl3945 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[ 7599.797419] iwl3945 0000:03:00.0: setting latency timer to 64
[ 7599.837714] iwl3945 0000:03:00.0: Tunable channels: 13 802.11bg, 23 802.11a channels
[ 7599.837719] iwl3945 0000:03:00.0: Detected Intel Wireless WiFi Link 3945ABG
[ 7599.837880] iwl3945 0000:03:00.0: irq 45 for MSI/MSI-X
[ 7599.838124] Registered led device: phy0-led
[ 7599.838170] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
[ 7599.838335] ieee80211 phy0: Selected rate control algorithm 'iwl-3945-rs'
[ 7599.980440] iwl3945 0000:03:00.0: loaded firmware version 15.32.2.9
[ 7599.980656] iwl3945 0000:03:00.0: Radio disabled by HW RF Kill switch
[ 7599.983562] iwl3945 0000:03:00.0: Radio disabled by HW RF Kill switch
[ 7906.428550] iwl3945 0000:03:00.0: PCI INT A disabled
[ 7913.242835] cfg80211: Calling CRDA to update world regulatory domain
[ 7913.249969] cfg80211: World regulatory domain updated:
[ 7913.249973] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 7913.249978] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 7913.249982] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 7913.249986] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 7913.249990] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 7913.249994] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 7913.311805] iwl3945: Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux, in-tree:s
[ 7913.311810] iwl3945: Copyright(c) 2003-2011 Intel Corporation
[ 7913.311885] iwl3945 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[ 7913.311907] iwl3945 0000:03:00.0: setting latency timer to 64
[ 7913.352172] iwl3945 0000:03:00.0: Tunable channels: 13 802.11bg, 23 802.11a channels
[ 7913.352177] iwl3945 0000:03:00.0: Detected Intel Wireless WiFi Link 3945ABG
[ 7913.352330] iwl3945 0000:03:00.0: irq 45 for MSI/MSI-X
[ 7913.352601] Registered led device: phy0-led
[ 7913.352642] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
[ 7913.352806] ieee80211 phy0: Selected rate control algorithm 'iwl-3945-rs'
[ 7913.385208] iwl3945 0000:03:00.0: loaded firmware version 15.32.2.9
[ 7913.385384] iwl3945 0000:03:00.0: Radio disabled by HW RF Kill switch
[ 7913.387138] iwl3945 0000:03:00.0: Radio disabled by HW RF Kill switch
Source: (StackOverflow)
I have a Dell E6510 and after installing Ubuntu and connecting to a wireless network, my Wifi LED keeps blinking all the time, probably in response to traffic.
This is really annoying because it keeps drawing my attention away from the screen. Is there any way to turn this functionality off and just let the wifi light stay on all the time as long as it has a wifi connection?
Here is my lspci for the wifi:
Network controller: Intel Corporation Centrino Advanced-N 6200 (rev 35)
Source: (StackOverflow)
I just installed Ubuntu Server on a spare computer with a broken graphic card, and I needed to setup my wifi.
I thought No problem, I've done it before from the command line, in Arch Linux., only the steps I had to take in Arch Linux didn't work in Ubuntu Server (that's odd, wasn't Ubuntu supposed to be so much more user-friendly? :/).
This is what I'd normally do:
ip link set wlan0 up
wpa_passphrase <ESSID> <WPA KEY> > /etc/wpa_supplicant.conf
wpa_supplicant -B -Dwext -i wlan0 -c /etc/wpa_supplicant.conf
dhcpcd wlan0
Only at the wpa_supplicant I get some strane message:
ioctl[SIOCSIWENCODEEXT]: Invalid argument
ioctl[SIOCSIWENCODEEXT]: Invalid argument
And if I try to run dhcpcd then (which I manually installed, as it didn't come preinstalled with Ubuntu Server), it times out.
Help on how to do it would be much appreciated.
My wireless driver is iwl3945.
Source: (StackOverflow)
My wifi connection has gone unstable and I suspect it has something to do with upgrading to 15.04.
I am working on a Lenovo Yoga 2 (not pro) laptop. The wireless card is Intel 7260, the driver is iwlwifi.
In case that is useful, here is additional info:
>> cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=15.04
DISTRIB_CODENAME=vivid
DISTRIB_DESCRIPTION="Ubuntu 15.04"
>> lsusb
Bus 003 Device 002: ID 8087:8000 Intel Corp.
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 006: ID 048d:8350 Integrated Technology Express, Inc.
Bus 001 Device 005: ID 8087:07dc Intel Corp.
Bus 001 Device 004: ID 04f2:b40f Chicony Electronics Co., Ltd
Bus 001 Device 003: ID 04f3:0303 Elan Microelectronics Corp.
Bus 001 Device 002: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>> lspci -k -nn | grep -A 3 -i net
01:00.0 Network controller [0280]: Intel Corporation Wireless 7260 [8086:08b2] (rev 6b)
Subsystem: Intel Corporation Wireless-N 7260 [8086:c262]
Kernel driver in use: iwlwifi
>> sudo lshw -C network
*-network
description: Interface réseau sans fil
produit: Wireless 7260
fabriquant: Intel Corporation
identifiant matériel: 0
information bus: pci@0000:01:00.0
nom logique: wlan0
version: 6b
numéro de série: e8:b1:fc:0c:54:b3
bits: 64 bits
horloge: 33MHz
fonctionnalités: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=3.19.0-15-generic firmware=25.15.12.0 ip=192.168.25.76 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
ressources: irq:45 mémoire:b0400000-b0401fff
>> lsmod
Module Size Used by
ctr 16384 1
ccm 20480 1
binfmt_misc 20480 1
rfcomm 69632 8
bnep 20480 2
rtsx_usb_ms 20480 0
memstick 20480 1 rtsx_usb_ms
hid_sensor_magn_3d 16384 0
hid_sensor_incl_3d 16384 0
hid_sensor_rotation 16384 0
hid_sensor_accel_3d 16384 0
hid_sensor_gyro_3d 16384 0
hid_sensor_als 16384 0
hid_sensor_trigger 16384 12 hid_sensor_gyro_3d,hid_sensor_incl_3d,hid_sensor_accel_3d,hid_sensor_rotation,hid_sensor_als,hid_sensor_magn_3d
industrialio_triggered_buffer 16384 6 hid_sensor_gyro_3d,hid_sensor_incl_3d,hid_sensor_accel_3d,hid_sensor_rotation,hid_sensor_als,hid_sensor_magn_3d
kfifo_buf 16384 1 industrialio_triggered_buffer
industrialio 57344 9 hid_sensor_trigger,hid_sensor_gyro_3d,industrialio_triggered_buffer,hid_sensor_incl_3d,hid_sensor_accel_3d,hid_sensor_rotation,hid_sensor_als,kfifo_buf,hid_sensor_magn_3d
hid_sensor_iio_common 16384 6 hid_sensor_gyro_3d,hid_sensor_incl_3d,hid_sensor_accel_3d,hid_sensor_rotation,hid_sensor_als,hid_sensor_magn_3d
hid_multitouch 20480 0
hid_sensor_hub 20480 8 hid_sensor_trigger,hid_sensor_gyro_3d,hid_sensor_incl_3d,hid_sensor_accel_3d,hid_sensor_rotation,hid_sensor_als,hid_sensor_magn_3d,hid_sensor_iio_common
uvcvideo 90112 0
videobuf2_vmalloc 16384 1 uvcvideo
videobuf2_memops 16384 1 videobuf2_vmalloc
videobuf2_core 49152 1 uvcvideo
v4l2_common 16384 1 videobuf2_core
videodev 159744 3 uvcvideo,v4l2_common,videobuf2_core
usbhid 53248 0
media 24576 2 uvcvideo,videodev
btusb 32768 0
bluetooth 491520 22 bnep,btusb,rfcomm
arc4 16384 2
snd_hda_codec_hdmi 53248 1
joydev 20480 0
intel_rapl 20480 0
iosf_mbi 16384 1 intel_rapl
x86_pkg_temp_thermal 16384 0
intel_powerclamp 20480 0
coretemp 16384 0
kvm 483328 0
iwlmvm 278528 0
mac80211 720896 1 iwlmvm
crct10dif_pclmul 16384 0
crc32_pclmul 16384 0
ghash_clmulni_intel 16384 0
snd_hda_codec_realtek 86016 1
aesni_intel 172032 3
snd_hda_codec_generic 69632 1 snd_hda_codec_realtek
iwlwifi 196608 1 iwlmvm
aes_x86_64 20480 1 aesni_intel
lrw 16384 1 aesni_intel
i915 1052672 7
gf128mul 16384 1 lrw
cfg80211 540672 3 iwlwifi,mac80211,iwlmvm
glue_helper 16384 1 aesni_intel
ablk_helper 16384 1 aesni_intel
cryptd 20480 3 ghash_clmulni_intel,aesni_intel,ablk_helper
snd_soc_rt5640 94208 0
snd_soc_rl6231 16384 1 snd_soc_rt5640
snd_hda_intel 32768 7
snd_hda_controller 32768 1 snd_hda_intel
shpchp 40960 0
snd_hda_codec 143360 5 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller
snd_soc_core 196608 1 snd_soc_rt5640
snd_compress 20480 1 snd_soc_core
mei_me 20480 0
snd_hwdep 20480 1 snd_hda_codec
snd_pcm_dmaengine 16384 1 snd_soc_core
serio_raw 16384 0
mei 90112 1 mei_me
snd_pcm 106496 8 snd_soc_rt5640,snd_soc_core,snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_controller,snd_pcm_dmaengine
snd_seq_midi 16384 0
lpc_ich 24576 0
snd_seq_midi_event 16384 1 snd_seq_midi
snd_rawmidi 32768 1 snd_seq_midi
snd_seq 69632 2 snd_seq_midi_event,snd_seq_midi
drm_kms_helper 122880 1 i915
snd_seq_device 16384 3 snd_seq,snd_rawmidi,snd_seq_midi
drm 344064 6 i915,drm_kms_helper
snd_timer 32768 2 snd_pcm,snd_seq
i2c_algo_bit 16384 1 i915
snd 90112 26 snd_hda_codec_realtek,snd_soc_core,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,snd_seq_device,snd_compress
ideapad_laptop 20480 0
soundcore 16384 2 snd,snd_hda_codec
sparse_keymap 16384 1 ideapad_laptop
i2c_hid 20480 0
hid 110592 4 i2c_hid,hid_multitouch,hid_sensor_hub,usbhid
video 20480 1 i915
dw_dmac 16384 0
dw_dmac_core 24576 1 dw_dmac
snd_soc_sst_acpi 16384 0
8250_dw 16384 0
i2c_designware_platform 16384 0
spi_pxa2xx_platform 24576 0
i2c_designware_core 16384 1 i2c_designware_platform
soc_button_array 16384 0
mac_hid 16384 0
parport_pc 32768 0
ppdev 20480 0
lp 20480 0
parport 45056 3 lp,ppdev,parport_pc
autofs4 40960 2
rtsx_usb_sdmmc 28672 0
rtsx_usb 24576 2 rtsx_usb_sdmmc,rtsx_usb_ms
psmouse 118784 0
ahci 36864 1
libahci 32768 1 ahci
sdhci_acpi 16384 0
sdhci 45056 1 sdhci_acpi
[/code]
[code]
>> iwconfig
wlan0 IEEE 802.11bgn ESSID:"GVT-947C"
Mode:Managed Frequency:2.462 GHz Access Point: 00:0C:C3:3B:94:7C
Bit Rate=1 Mb/s Tx-Power=22 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on
Link Quality=45/70 Signal level=-65 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:13 Invalid misc:87 Missed beacon:0
>> ifconfig -a
lo Link encap:Boucle locale
inet adr:127.0.0.1 Masque:255.0.0.0
adr inet6: ::1/128 Scope:Hôte
UP LOOPBACK RUNNING MTU:65536 Metric:1
Packets reçus:6898 erreurs:0 :0 overruns:0 frame:0
TX packets:6898 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:0
Octets reçus:626740 (626.7 KB) Octets transmis:626740 (626.7 KB)
wlan0 Link encap:Ethernet HWaddr e8:b1:fc:0c:54:b3
inet adr:192.168.25.76 Bcast:192.168.25.255 Masque:255.255.255.0
adr inet6: fe80::eab1:fcff:fe0c:54b3/64 Scope:Lien
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Packets reçus:200288 erreurs:0 :0 overruns:0 frame:0
TX packets:139328 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:1000
Octets reçus:207651439 (207.6 MB) Octets transmis:19177032 (19.1 MB)
>> sudo iwlist scan
wlan0 Scan completed :
Cell 01 - Address: 00:0C:C3:3B:94:7C
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=48/70 Signal level=-62 dBm
Encryption key:on
ESSID:"GVT-947C"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
24 Mb/s; 36 Mb/s; 54 Mb/s
Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
Mode:Master
Extra:tsf=0000000de3b507a8
Extra: Last beacon: 26572ms ago
IE: Unknown: 00084756542D39343743
IE: Unknown: 010882848B962430486C
IE: Unknown: 03010B
IE: Unknown: 0706425220010D14
IE: Unknown: 2A0106
IE: Unknown: 2F0106
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
IE: Unknown: 32040C121860
IE: Unknown: 0B0508007A0000
IE: Unknown: 2D1ABC1817FFFF000000000000000000000000000000000000000000
IE: Unknown: 3D160B001700000000000000000000000000000000000000
IE: Unknown: 7F03000008
IE: Unknown: DD800050F204104A0001101044000102103B000103104700107A100A47716E8627B12CA6C7656292D41021000842726F6164636F6D1023000842726F6164636F6D1024000631323334353610420004313233341054000800060050F20400011011000A42726F6164636F6D415010080002200C103C0001011049000600372A000120
IE: Unknown: DD090010180208040C0000
IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
>> uname -r -m
3.19.0-15-generic x86_64
>> cat /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
>> nm-tool
>> sudo rfkill list
0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
1: ideapad_bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
2: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
3: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
And as requested by spinxz in the comments below:
>> modinfo iwlwifi | grep 7260
firmware: iwlwifi-7260-10.ucode
>> dmesg | grep iwl
[ 2.303627] iwlwifi 0000:01:00.0: loaded firmware version 25.15.12.0 op_modeiwlmvm
[ 2.333529] iwlwifi 0000:01:00.0: Detected Intel(R) Wireless N 7260, REV=0x144
[ 2.333581] iwlwifi 0000:01:00.0: L1 Disabled - LTR Enabled
[ 2.333802] iwlwifi 0000:01:00.0: L1 Disabled - LTR Enabled
[ 2.555400] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
[ 4.830019] iwlwifi 0000:01:00.0: L1 Disabled - LTR Enabled
[ 4.830243] iwlwifi 0000:01:00.0: L1 Disabled - LTR Enabled
[ 66.550674] iwlwifi 0000:01:00.0: L1 Disabled - LTR Enabled
[ 66.550900] iwlwifi 0000:01:00.0: L1 Disabled - LTR Enabled
Another request (by gertvdijk in the comments below):
>> apt-cache policy linux-firmware
linux-firmware:
Installé : 1.143
Candidat : 1.143
Table de version :
*** 1.143 0
500 http://fr.archive.ubuntu.com/ubuntu/ vivid/main amd64 Packages
100 /var/lib/dpkg/status
To answer another question of sinxz, here is the output of dmesg | grep iwl after a disconnect and reconnect:
[ 2.303627] iwlwifi 0000:01:00.0: loaded firmware version 25.15.12.0 op_mode iwlmvm
[ 2.333529] iwlwifi 0000:01:00.0: Detected Intel(R) Wireless N 7260, REV=0x144
[ 2.333581] iwlwifi 0000:01:00.0: L1 Disabled - LTR Enabled
[ 2.333802] iwlwifi 0000:01:00.0: L1 Disabled - LTR Enabled
[ 2.555400] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
[ 4.830019] iwlwifi 0000:01:00.0: L1 Disabled - LTR Enabled
[ 4.830243] iwlwifi 0000:01:00.0: L1 Disabled - LTR Enabled
[ 66.550674] iwlwifi 0000:01:00.0: L1 Disabled - LTR Enabled
[ 66.550900] iwlwifi 0000:01:00.0: L1 Disabled - LTR Enabled
[ 2212.567922] iwlwifi 0000:01:00.0: L1 Disabled - LTR Enabled
[ 2212.568146] iwlwifi 0000:01:00.0: L1 Disabled - LTR Enabled
Edit: I also posted this question on the official French Ubuntu forum (here), and a user there made remarks that raise two questions:
- Is it possible that power management was always off on my previous version of Ubuntu (14.10)?
Is it normal that there is a file iwlwifi.conf in /etc/modprobe.d with the following content?
# /etc/modprobe.d/iwlwifi.conf
# iwlwifi will dyamically load either iwldvm or iwlmvm depending on the
# microcode file installed on the system. When removing iwlwifi, first
# remove the iwl?vm module and then iwlwifi.
remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs/sbin/rmmod) \
&& /sbin/modprobe -r mac80211
Edit 2: It seems that my problem could now be completely solved. Let me make a few clarifications: the "instability" of my connection can be summed up by two "symptoms":
- Slow rates (concretely, max download speed at around 150Kb/s instead of 1Mb/s when it worked properly)
- "Effective disconnection" very frequently (every 30 seconds, say). What I mean by that is that the connection is not working at all, but the wifi does not "officially" disconnect. It comes back after waiting a few seconds (10 to 20s, say) or reconnecting to the network.
At first I thought that doing sudo iwconfig wlan0 power off solved these issues completely, even if turning off power management is apparently not a "sustainable" solution (see spinxz's comments below). However I then realized that symptom #2 is still there, although much less frequently.
On the French Ubuntu forum (here), someone suggested I try to manually put the latest version of the version 12 firmware (downloadable here: https://wireless.wiki.kernel.org/_media/en/users/drivers/iwlwifi-7260-ucode-25.17.12.0.tgz) in /lib/firmware. I did that, and now the problem seems to be solved completely. To be honest, it might also have something to do with recent Ubuntu updates (they were a lot recently), I don't know. I am still not 100% certain the connection is back to working perfectly, or if it is only as good as the "power management off" solution, for example. I will let you know if that is the case.
Source: (StackOverflow)
I yesterday upgraded from Windows to Ubuntu 15.04 but I have problem with my wireless adapter Intel Corporation Wireless 7260 (rev 73). It randomly loses internet connection. Restarting adapter always helps. (same it did with Windows, except that sometimes restarting adapter didn't help).
Additionally, I have weaker connection then I had with Windows.
Thank you!
Source: (StackOverflow)
I have a thinkpad yoga 14, and I installed Ubuntu 15.10 on it.
Wireless isn't working.
sudo lshw -c network has (for the relevant device):
zck@my-computer:~/Downloads$ sudo lshw -c network
*-network UNCLAIMED
description: Network controller
product: Wireless 8260
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:03:00.0
version: 3a
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress cap_list
configuration: latency=0
resources: memory:d2a00000-d2a01fff
I downloaded the Intel Wireless WiFi Link 8260 AC Adapter, and untarred it, so now I have iwlwifi-8000C-15.ucode, and I put it in /lib/firmware as it says, but I'm not sure how to hook that up to iwlwifi, or even if that's the correct thing to do.
additional requested commands:
zck@my-computer:~/Downloads$ lspci -nnk | grep 0280 -A2
03:00.0 Network controller [0280]: Intel Corporation Wireless 8260 [8086:24f3] (rev 3a)
Subsystem: Intel Corporation Device [8086:1130]
06:00.0 3D controller [0302]: NVIDIA Corporation GM108M [GeForce 940M] [10de:1347] (rev a2)
zck@my-computer:~/Downloads$ sudo modprobe iwlwifi
zck@my-computer:~/Downloads$ dmesg | grep iwl
[ 5417.697371] iwlmvm iwlwifi mac80211 cfg80211 asix usbnet mii rfcomm bnep uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common wacom btusb btrtl btbcm btintel bluetooth videodev media nls_iso8859_1 snd_hda_codec_hdmi spi_pxa2xx_platform 8250_dw snd_hda_codec_conexant snd_hda_codec_generic intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd snd_hda_intel input_leds joydev snd_hda_codec idma64 snd_hda_core virt_dma snd_hwdep serio_raw snd_pcm intel_lpss_pci shpchp mei_me thinkpad_acpi mei nvram snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd intel_lpss_acpi intel_lpss soundcore mac_hid acpi_pad tpm_crb parport_pc ppdev
[ 6027.901140] iwlmvm iwlwifi mac80211 cfg80211 asix usbnet mii rfcomm bnep uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common wacom btusb btrtl btbcm btintel bluetooth videodev media nls_iso8859_1 snd_hda_codec_hdmi spi_pxa2xx_platform 8250_dw snd_hda_codec_conexant snd_hda_codec_generic intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd snd_hda_intel input_leds joydev snd_hda_codec idma64 snd_hda_core virt_dma snd_hwdep serio_raw snd_pcm intel_lpss_pci shpchp mei_me thinkpad_acpi mei nvram snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd intel_lpss_acpi intel_lpss soundcore mac_hid acpi_pad tpm_crb parport_pc ppdev
[ 6374.578584] iwlmvm iwlwifi mac80211 cfg80211 asix usbnet mii rfcomm bnep uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common wacom btusb btrtl btbcm btintel bluetooth videodev media nls_iso8859_1 snd_hda_codec_hdmi spi_pxa2xx_platform 8250_dw snd_hda_codec_conexant snd_hda_codec_generic intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd snd_hda_intel input_leds joydev snd_hda_codec idma64 snd_hda_core virt_dma snd_hwdep serio_raw snd_pcm intel_lpss_pci shpchp mei_me thinkpad_acpi mei nvram snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd intel_lpss_acpi intel_lpss soundcore mac_hid acpi_pad tpm_crb parport_pc ppdev
[ 6389.342802] iwlmvm iwlwifi mac80211 cfg80211 asix usbnet mii rfcomm bnep uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common wacom btusb btrtl btbcm btintel bluetooth videodev media nls_iso8859_1 snd_hda_codec_hdmi spi_pxa2xx_platform 8250_dw snd_hda_codec_conexant snd_hda_codec_generic intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd snd_hda_intel input_leds joydev snd_hda_codec idma64 snd_hda_core virt_dma snd_hwdep serio_raw snd_pcm intel_lpss_pci shpchp mei_me thinkpad_acpi mei nvram snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd intel_lpss_acpi intel_lpss soundcore mac_hid acpi_pad tpm_crb parport_pc ppdev
[ 6420.052221] iwlmvm iwlwifi mac80211 cfg80211 asix usbnet mii rfcomm bnep uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common wacom btusb btrtl btbcm btintel bluetooth videodev media nls_iso8859_1 snd_hda_codec_hdmi spi_pxa2xx_platform 8250_dw snd_hda_codec_conexant snd_hda_codec_generic intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd snd_hda_intel input_leds joydev snd_hda_codec idma64 snd_hda_core virt_dma snd_hwdep serio_raw snd_pcm intel_lpss_pci shpchp mei_me thinkpad_acpi mei nvram snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd intel_lpss_acpi intel_lpss soundcore mac_hid acpi_pad tpm_crb parport_pc ppdev
[ 6420.996967] iwlmvm iwlwifi mac80211 cfg80211 asix usbnet mii rfcomm bnep uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common wacom btusb btrtl btbcm btintel bluetooth videodev media nls_iso8859_1 snd_hda_codec_hdmi spi_pxa2xx_platform 8250_dw snd_hda_codec_conexant snd_hda_codec_generic intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd snd_hda_intel input_leds joydev snd_hda_codec idma64 snd_hda_core virt_dma snd_hwdep serio_raw snd_pcm intel_lpss_pci shpchp mei_me thinkpad_acpi mei nvram snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd intel_lpss_acpi intel_lpss soundcore mac_hid acpi_pad tpm_crb parport_pc ppdev
[ 6425.191771] iwlmvm iwlwifi mac80211 cfg80211 asix usbnet mii rfcomm bnep uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common wacom btusb btrtl btbcm btintel bluetooth videodev media nls_iso8859_1 snd_hda_codec_hdmi spi_pxa2xx_platform 8250_dw snd_hda_codec_conexant snd_hda_codec_generic intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd snd_hda_intel input_leds joydev snd_hda_codec idma64 snd_hda_core virt_dma snd_hwdep serio_raw snd_pcm intel_lpss_pci shpchp mei_me thinkpad_acpi mei nvram snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd intel_lpss_acpi intel_lpss soundcore mac_hid acpi_pad tpm_crb parport_pc ppdev
[ 6425.718504] iwlmvm iwlwifi mac80211 cfg80211 asix usbnet mii rfcomm bnep uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common wacom btusb btrtl btbcm btintel bluetooth videodev media nls_iso8859_1 snd_hda_codec_hdmi spi_pxa2xx_platform 8250_dw snd_hda_codec_conexant snd_hda_codec_generic intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd snd_hda_intel input_leds joydev snd_hda_codec idma64 snd_hda_core virt_dma snd_hwdep serio_raw snd_pcm intel_lpss_pci shpchp mei_me thinkpad_acpi mei nvram snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd intel_lpss_acpi intel_lpss soundcore mac_hid acpi_pad tpm_crb parport_pc ppdev
[ 6765.743640] iwlmvm iwlwifi mac80211 cfg80211 asix usbnet mii rfcomm bnep uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common wacom btusb btrtl btbcm btintel bluetooth videodev media nls_iso8859_1 snd_hda_codec_hdmi spi_pxa2xx_platform 8250_dw snd_hda_codec_conexant snd_hda_codec_generic intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd snd_hda_intel input_leds joydev snd_hda_codec idma64 snd_hda_core virt_dma snd_hwdep serio_raw snd_pcm intel_lpss_pci shpchp mei_me thinkpad_acpi mei nvram snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd intel_lpss_acpi intel_lpss soundcore mac_hid acpi_pad tpm_crb parport_pc ppdev
[ 6847.871215] iwlmvm iwlwifi mac80211 cfg80211 asix usbnet mii rfcomm bnep uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common wacom btusb btrtl btbcm btintel bluetooth videodev media nls_iso8859_1 snd_hda_codec_hdmi spi_pxa2xx_platform 8250_dw snd_hda_codec_conexant snd_hda_codec_generic intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd snd_hda_intel input_leds joydev snd_hda_codec idma64 snd_hda_core virt_dma snd_hwdep serio_raw snd_pcm intel_lpss_pci shpchp mei_me thinkpad_acpi mei nvram snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd intel_lpss_acpi intel_lpss soundcore mac_hid acpi_pad tpm_crb parport_pc ppdev
Source: (StackOverflow)
I have a Dell XPS 12 running Ubuntu 13.10 and it doesn't appear to find it's wireless. I have tried the suggestions here but they made no difference
peter@xps:/lib/firmware$ ls -l /lib/firmware/iwlwifi-7260-7.ucode
-rw-r--r-- 1 root root 682892 Aug 4 12:50 /lib/firmware/iwlwifi-7260-7.ucode
peter@xps:/lib/firmware$ sudo lshw -c network
*-network UNCLAIMED
description: Network controller
product: Wireless 7260
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:06:00.0
version: 63
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress cap_list
configuration: latency=0
resources: memory:f7c00000-f7c01fff
peter@xps:~/backports-3.10-2$ grep IWL7260_UCODE_API_MAX drivers/net/wireless/iwlwifi/iwl-7000.c
#define IWL7260_UCODE_API_MAX 7
.ucode_api_max = IWL7260_UCODE_API_MAX, \
peter@xps:~/backports-3.10-2$ dmesg | grep iwl
peter@xps:~/backports-3.10-2$ iwconfig
lo no wireless extensions.
peter@xps:~$ find / -name *7260-6*
peter@xps:~$ find / -name *7260-7*
/lib/firmware/iwlwifi-7260-7.ucode
peter@xps:~$ dmesg | grep -i -A 20 intel
[ 1318.013278] Intel(R) Wireless WiFi driver for Linux, in-tree:d
[ 1318.013281] Copyright(c) 2003-2013 Intel Corporation
[ 1318.015154] cfg80211: World regulatory domain updated:
[ 1318.015157] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 1318.015159] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 1318.015161] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 1318.015162] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 1318.015164] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 1318.015165] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
What I have found is that it appears to be loading an old version of the firmware but I don't know how or why
peter@xps:/lib/firmware$ modinfo iwlwifi | grep 7260
firmware: iwlwifi-7260-6.ucode
peter@xps:/lib/firmware$ ls *7260-6*
ls: cannot access *7260-6*: No such file or directory
Any suggestions of how to get this setup very welcome.
Source: (StackOverflow)
My Thinkpad X1 Carbon apparently supports Intel WiDi. I believe this should, in theory, allow me to share my screen with my Sony Bravia TV which supports Miracast.
Is it possible to make use of Wireless Display in Ubuntu to share my display with my TV?
Edit:
I found a thread on ubuntuforums.com about this very issue. It was started in 2010 but it appears that as of the final post (January 2013) there was still no WiDi support in Ubuntu. As the commenter mentions, Windows 7 has had support for a while.
Source: (StackOverflow)
I am a new Ubuntu user and have installed Ubuntu 12.04 LTS on my Acer Aspire One D255 netbook with an Intel Centrino N1000 Wireless Card. All I want is to set my netbook as wifi hotspot for my android devices. This worked well for me in Windows 7 using Connectify but I am trying to make hotspot in Ubuntu using hostapd (http://nims11.wordpress.com/2012/04/27/hostapd-the-linux-way-to-create-virtual-wifi-access-point/comment-page-5/) but getting following error:
ali@ali-AOD255:~$ sudo hostapd ~/hostapd-test.conf
Configuration file: /home/ali/hostapd-test.conf
nl80211: Failed to set interface wlan0 into AP mode
nl80211 driver initialization failed.
ELOOP: remaining socket: sock=4 eloop_data=0x8178910 user_data=0x8178e80 handler=0x807c5e0
ELOOP: remaining socket: sock=6 eloop_data=0x817ac98 user_data=(nil) handler=0x8086770
All I want is to setup a wifi hotspot using my netbook so that my android devices can view and connect to it.
Source: (StackOverflow)
I did a fresh install of Ubuntu 14.04 LTS on the harddisk of a Lenovo Y650 Ideapad laptop. The wireless adapter is an Intel PRO/Wireless 5100 AGN [Shiloh].
Initially I could not connect to any wireless networks; however, I could see them. There are no issues when connecting via Ethernet. I was only able to connect to the wireless network by entering this command in the Terminal:
echo "options iwlwifi 11n_disable=1" | sudo tee /etc/modprobe.d/iwlwifi.conf
The speeds are extremely slow and intermittent. When I am able to run a speed test, the ping is good (24 to 26 ms) but the download speeds range from 0.15 to 0.30 Mbps.
iwconfig
eth0 no wireless extensions.
lo no wireless extensions.
wlan0 IEEE 802.11abg ESSID:"PinkRabbit"
Mode:Managed Frequency:2.412 GHz Access Point: E8:40:F2:CD:18:0B
Bit Rate=2 Mb/s Tx-Power=15 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=70/70 Signal level=-26 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:3 Invalid misc:254 Missed beacon:0
ifconfig
eth0 Link encap:Ethernet HWaddr 00:23:5a:d2:70:91
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:17
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:171 errors:0 dropped:0 overruns:0 frame:0
TX packets:171 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:15613 (15.6 KB) TX bytes:15613 (15.6 KB)
wlan0 Link encap:Ethernet HWaddr 00:1e:65:3e:0c:48
inet addr:192.168.0.13 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::21e:65ff:fe3e:c48/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:42 errors:0 dropped:0 overruns:0 frame:0
TX packets:96 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:9032 (9.0 KB) TX bytes:16851 (16.8 KB)
nm-tool
NetworkManager Tool
State: connected (global)
- Device: eth0 -----------------------------------------------------------------
Type: Wired
Driver: tg3
State: unavailable
Default: no
HW Address: 00:23:5A:D2:70:91
Capabilities:
Carrier Detect: yes
Wired Properties
Carrier: off
- Device: wlan0 [PinkRabbit] --------------------------------------------------
Type: 802.11 WiFi
Driver: iwlwifi
State: connected
Default: yes
HW Address: 00:1E:65:3E:0C:48
Capabilities:
Speed: 1 Mb/s
Wireless Properties
WEP Encryption: yes
WPA Encryption: yes
WPA2 Encryption: yes
Wireless Access Points (* = current AP)
*PinkRabbit: Infra, E8:40:F2:CD:18:0B, Freq 2412 MHz, Rate 54 Mb/s, Strength 92 WPA WPA2
IPv4 Settings:
Address: 192.168.0.13
Prefix: 24 (255.255.255.0)
Gateway: 192.168.0.1
DNS: 64.71.255.204
DNS: 64.71.255.198
DNS: 8.8.8.8
DNS: 8.8.4.4
Source: (StackOverflow)
On Ubuntu 14.04 32bit, after some up-time my wireless card stops working. Sometimes it helps to stop WiFi in the nm-applett (at the top right corner) and restart it to get a new connection to my WiFi, but mostly this doesn't help anymore - you have to reboot to use the card again.
I had this at several different locations so it was definitely a problem with my card.
The kernel at the moment:
$ uname -rp
3.14.1-031401-generic i686
My guess is that the wireless power save option that is set by powertop might cause some problems, so I added this to my /etc/rc.local so the end part looked like this:
# By default this script does nothing.
#####################################################
# tune all power save settings to >good<
powertop --auto-tune
once I disabled that option again, the wireless card seems to work better, but not all the time.
When in the crashed state and if I try to re-enable WiFi in the nm-applet I get this error in /var/log/syslog:
iwlwifi 0000:01:00.0: Failed to load firmware chunk!
I collected some data with the help of this answer:
##### lspci #####
01:00.0 Network controller [0280]: Intel Corporation Wireless 7260 [8086:08b2] (rev 6b)
Subsystem: Intel Corporation Wireless-N 7260 [8086:c262]
Kernel driver in use: iwlwifi
full results
If I look for locate 7260|grep -i wifi, I find the same module /lib/firmware/iwlwifi-7260-8.ucode. It deosn't use the latest drivers from wireless.kernel.org because the iwlwifi-7260-9.ucode is not supported yet.)
How can I fix this problem on my Lenovo Yoga 2 Pro? Maybe it is possible to reload the kernel module somehow to re-enable it with a script if it died?
Source: (StackOverflow)
When I use my laptop running Ubuntu 12.04 as hotspot, I am only allowed to use WEP security instead of WPA.
I dual boot Ubuntu with Windows on this laptop and when I use Windows to create the hotspot I am allowed to use WPA security so it is not a hardware issue.
- I use Intel PRO/Wireless 3945ABG wireless connection.
Source: (StackOverflow)
I'm having problems with the Wifi on my Xubuntu 13.10 and my new Lenovo X240 laptop. Sometimes the driver crashes.
lspci|grep -i wi
03:00.0 Network controller: Intel Corporation Wireless 7260 (rev 83)
dmesg
[ 7522.845255] WARNING: CPU: 1 PID: 842 at /build/buildd/linux-3.11.0/drivers/net/wireless/iwlwifi/mvm/phy-ctxt.c:208 iwl_mvm_phy_ctxt_add+0x44/0x80 [iwlmvm]()
[ 7522.845259] Modules linked in: dm_crypt pci_stub vboxpci(OF) vboxnetadp(OF) vboxnetflt(OF) vboxdrv(OF) joydev parport_pc ppdev rfcomm bnep bluetooth arc4 x86_pkg_temp_thermal coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd binfmt_misc uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core videodev snd_hda_codec_realtek snd_hda_codec_hdmi nls_iso8859_1 snd_hda_intel snd_hda_codec snd_hwdep ext2 microcode snd_pcm snd_page_alloc snd_seq_midi snd_seq_midi_event snd_rawmidi psmouse serio_raw iwlmvm mac80211 thinkpad_acpi snd_seq nvram snd_seq_device tpm_tis snd_timer iwlwifi snd cfg80211 lpc_ich mei_me mei soundcore lp parport mac_hid intel_smartconnect hid_generic usbhid hid i915 i2c_algo_bit drm_kms_helper e1000e drm ahci ptp libahci pps_core wmi video
[ 7522.845364] CPU: 1 PID: 842 Comm: NetworkManager Tainted: GF W O 3.11.0-15-generic #23-Ubuntu
[ 7522.845368] Hardware name: LENOVO 20ALCTO1WW/20ALCTO1WW, BIOS GIET62WW (2.12 ) 09/25/2013
[ 7522.845371] 0000000000000009 ffff880210751620 ffffffff816e7335 0000000000000000
[ 7522.845379] ffff880210751658 ffffffff81061dcd ffff88020c443b68 ffff88020c4437b0
[ 7522.845385] 0000000000000000 ffff88020c443b68 ffff88020c443b98 ffff880210751668
[ 7522.845392] Call Trace:
[ 7522.845405] [<ffffffff816e7335>] dump_stack+0x45/0x56
[ 7522.845415] [<ffffffff81061dcd>] warn_slowpath_common+0x7d/0xa0
[ 7522.845422] [<ffffffff81061eaa>] warn_slowpath_null+0x1a/0x20
[ 7522.845437] [<ffffffffa03bb3a4>] iwl_mvm_phy_ctxt_add+0x44/0x80 [iwlmvm]
[ 7522.845450] [<ffffffffa03b79c7>] iwl_mvm_up+0x237/0x270 [iwlmvm]
[ 7522.845463] [<ffffffffa03b9917>] iwl_mvm_mac_start+0x37/0x220 [iwlmvm]
[ 7522.845494] [<ffffffffa030d00c>] ieee80211_do_open+0x43c/0xd80 [mac80211]
[ 7522.845518] [<ffffffffa030a90b>] ? ieee80211_check_concurrent_iface+0x1b/0x1b0 [mac80211]
[ 7522.845544] [<ffffffffa030d9b9>] ieee80211_open+0x69/0x70 [mac80211]
[ 7522.845551] [<ffffffff815f2aef>] __dev_open+0xbf/0x140
[ 7522.845557] [<ffffffff815f2db2>] __dev_change_flags+0x92/0x170
[ 7522.845564] [<ffffffff815f2f3d>] dev_change_flags+0x1d/0x60
[ 7522.845570] [<ffffffff81600412>] do_setlink+0x332/0x9f0
[ 7522.845579] [<ffffffff81097355>] ? sched_clock_cpu+0xb5/0x100
[ 7522.845590] [<ffffffff811d803f>] ? __find_get_block+0xbf/0x230
[ 7522.845598] [<ffffffff8137df52>] ? nla_parse+0x32/0xe0
[ 7522.845604] [<ffffffff81601734>] rtnl_newlink+0x394/0x5e0
[ 7522.845613] [<ffffffff81318aa4>] ? apparmor_capable+0x24/0x180
[ 7522.845621] [<ffffffff815fe159>] rtnetlink_rcv_msg+0x99/0x260
[ 7522.845628] [<ffffffff81190ba8>] ? __kmalloc_node_track_caller+0x58/0x1d0
[ 7522.845634] [<ffffffff815e179e>] ? __alloc_skb+0x7e/0x2b0
[ 7522.845642] [<ffffffff815fe0c0>] ? rtnetlink_rcv+0x30/0x30
[ 7522.845648] [<ffffffff8161c069>] netlink_rcv_skb+0xa9/0xc0
[ 7522.845655] [<ffffffff815fe0b8>] rtnetlink_rcv+0x28/0x30
[ 7522.845660] [<ffffffff8161b6bd>] netlink_unicast+0xdd/0x190
[ 7522.845668] [<ffffffff8136eaad>] ? memcpy_fromiovec+0x4d/0x90
[ 7522.845673] [<ffffffff8161ba6f>] netlink_sendmsg+0x2ff/0x740
[ 7522.845682] [<ffffffff8161878c>] ? netlink_rcv_wake+0x3c/0x50
[ 7522.845687] [<ffffffff81619aa5>] ? netlink_recvmsg+0x205/0x390
[ 7522.845695] [<ffffffff815d92a9>] sock_sendmsg+0x99/0xd0
[ 7522.845701] [<ffffffff815d9968>] ? sock_recvmsg+0xa8/0xe0
[ 7522.845747] [<ffffffff81685e2c>] ? unix_dgram_sendmsg+0x59c/0x600
[ 7522.845758] [<ffffffff815d96e8>] ___sys_sendmsg+0x3b8/0x3d0
[ 7522.845791] [<ffffffff815d987e>] ? SYSC_sendto+0x17e/0x1c0
[ 7522.845826] [<ffffffff815da4e2>] __sys_sendmsg+0x42/0x80
[ 7522.845852] [<ffffffff815da532>] SyS_sendmsg+0x12/0x20
[ 7522.845878] [<ffffffff816f721d>] system_call_fastpath+0x1a/0x1f
Sometimes I just get errors
[ 7581.808662] iwlwifi 0000:03:00.0: Microcode SW error detected. Restarting 0x2000000.
[ 7581.808674] iwlwifi 0000:03:00.0: CSR values:
[ 7581.808679] iwlwifi 0000:03:00.0: (2nd byte of CSR_INT_COALESCING is CSR_INT_PERIODIC_REG)
[ 7581.808782] iwlwifi 0000:03:00.0: CSR_HW_IF_CONFIG_REG: 0X00489204
[ 7581.808840] iwlwifi 0000:03:00.0: CSR_INT_COALESCING: 0X00000040
[ 7581.808897] iwlwifi 0000:03:00.0: CSR_INT: 0X00000000
[ 7581.808953] iwlwifi 0000:03:00.0: CSR_INT_MASK: 0X00000000
[ 7581.809010] iwlwifi 0000:03:00.0: CSR_FH_INT_STATUS: 0X00000000
[ 7581.809066] iwlwifi 0000:03:00.0: CSR_GPIO_IN: 0X00000000
[ 7581.809121] iwlwifi 0000:03:00.0: CSR_RESET: 0X00000000
[ 7581.809176] iwlwifi 0000:03:00.0: CSR_GP_CNTRL: 0X080403c5
[ 7581.809233] iwlwifi 0000:03:00.0: CSR_HW_REV: 0X00000144
[ 7581.809289] iwlwifi 0000:03:00.0: CSR_EEPROM_REG: 0X00000000
[ 7581.809344] iwlwifi 0000:03:00.0: CSR_EEPROM_GP: 0X80000000
[ 7581.809400] iwlwifi 0000:03:00.0: CSR_OTP_GP_REG: 0X803a0000
[ 7581.809456] iwlwifi 0000:03:00.0: CSR_GIO_REG: 0X00080042
[ 7581.809534] iwlwifi 0000:03:00.0: CSR_GP_UCODE_REG: 0X00000000
[ 7581.809684] iwlwifi 0000:03:00.0: CSR_GP_DRIVER_REG: 0X00000000
[ 7581.809743] iwlwifi 0000:03:00.0: CSR_UCODE_DRV_GP1: 0X00000000
[ 7581.809894] iwlwifi 0000:03:00.0: CSR_UCODE_DRV_GP2: 0X00000000
[ 7581.809953] iwlwifi 0000:03:00.0: CSR_LED_REG: 0X00000060
[ 7581.810013] iwlwifi 0000:03:00.0: CSR_DRAM_INT_TBL_REG: 0X88211595
[ 7581.810164] iwlwifi 0000:03:00.0: CSR_GIO_CHICKEN_BITS: 0X27800200
[ 7581.810223] iwlwifi 0000:03:00.0: CSR_ANA_PLL_CFG: 0Xd55555d5
[ 7581.810375] iwlwifi 0000:03:00.0: CSR_HW_REV_WA_REG: 0X0001001a
[ 7581.810526] iwlwifi 0000:03:00.0: CSR_DBG_HPET_MEM_REG: 0Xffff0010
[ 7581.810533] iwlwifi 0000:03:00.0: FH register values:
[ 7581.810694] iwlwifi 0000:03:00.0: FH_RSCSR_CHNL0_STTS_WPTR_REG: 0X2118f900
[ 7581.810762] iwlwifi 0000:03:00.0: FH_RSCSR_CHNL0_RBDCB_BASE_REG: 0X02118f80
[ 7581.810831] iwlwifi 0000:03:00.0: FH_RSCSR_CHNL0_WPTR: 0X000000f0
[ 7581.810900] iwlwifi 0000:03:00.0: FH_MEM_RCSR_CHNL0_CONFIG_REG: 0X00801114
[ 7581.810968] iwlwifi 0000:03:00.0: FH_MEM_RSSR_SHARED_CTRL_REG: 0X000000fc
[ 7581.811033] iwlwifi 0000:03:00.0: FH_MEM_RSSR_RX_STATUS_REG: 0X03230000
[ 7581.811099] iwlwifi 0000:03:00.0: FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV: 0X00000000
[ 7581.811165] iwlwifi 0000:03:00.0: FH_TSSR_TX_STATUS_REG: 0X07ff0001
[ 7581.811231] iwlwifi 0000:03:00.0: FH_TSSR_TX_ERROR_REG: 0X00000000
[ 7581.811394] iwlwifi 0000:03:00.0: Start IWL Error Log Dump:
[ 7581.811399] iwlwifi 0000:03:00.0: Status: 0x00000000, count: 6
[ 7581.811404] iwlwifi 0000:03:00.0: 0x0000003C | NMI_INTERRUPT_DATA_ACTION_PT
[ 7581.811407] iwlwifi 0000:03:00.0: 0x00000230 | uPc
[ 7581.811411] iwlwifi 0000:03:00.0: 0x00000000 | branchlink1
[ 7581.811415] iwlwifi 0000:03:00.0: 0x00000C8A | branchlink2
[ 7581.811418] iwlwifi 0000:03:00.0: 0x00014078 | interruptlink1
[ 7581.811422] iwlwifi 0000:03:00.0: 0x00000676 | interruptlink2
[ 7581.811426] iwlwifi 0000:03:00.0: 0x00000D40 | data1
[ 7581.811429] iwlwifi 0000:03:00.0: 0x00000008 | data2
[ 7581.811433] iwlwifi 0000:03:00.0: 0x03230000 | data3
[ 7581.811436] iwlwifi 0000:03:00.0: 0x66418352 | beacon time
[ 7581.811440] iwlwifi 0000:03:00.0: 0x9C09287A | tsf low
[ 7581.811444] iwlwifi 0000:03:00.0: 0x00000023 | tsf hi
[ 7581.811447] iwlwifi 0000:03:00.0: 0x00000000 | time gp1
[ 7581.811451] iwlwifi 0000:03:00.0: 0x03844AFE | time gp2
[ 7581.811454] iwlwifi 0000:03:00.0: 0x00000000 | time gp3
[ 7581.811458] iwlwifi 0000:03:00.0: 0x00321600 | uCode version
[ 7581.811462] iwlwifi 0000:03:00.0: 0x00000144 | hw version
[ 7581.811465] iwlwifi 0000:03:00.0: 0x00489204 | board version
[ 7581.811469] iwlwifi 0000:03:00.0: 0x0000001C | hcmd
[ 7581.811473] iwlwifi 0000:03:00.0: 0xA6F62000 | isr0
[ 7581.811476] iwlwifi 0000:03:00.0: 0x01004000 | isr1
[ 7581.811480] iwlwifi 0000:03:00.0: 0x00000002 | isr2
[ 7581.811483] iwlwifi 0000:03:00.0: 0x0041FC85 | isr3
[ 7581.811487] iwlwifi 0000:03:00.0: 0x00000000 | isr4
[ 7581.811490] iwlwifi 0000:03:00.0: 0x10000112 | isr_pref
[ 7581.811494] iwlwifi 0000:03:00.0: 0x00000D40 | wait_event
[ 7581.811497] iwlwifi 0000:03:00.0: 0x000000D0 | l2p_control
[ 7581.811501] iwlwifi 0000:03:00.0: 0x00010030 | l2p_duration
[ 7581.811505] iwlwifi 0000:03:00.0: 0x0000003F | l2p_mhvalid
[ 7581.811508] iwlwifi 0000:03:00.0: 0x000000CE | l2p_addr_match
[ 7581.811512] iwlwifi 0000:03:00.0: 0x00000007 | lmpm_pmg_sel
[ 7581.811516] iwlwifi 0000:03:00.0: 0x63E8869E | timestamp
[ 7581.811519] iwlwifi 0000:03:00.0: 0x0034F000 | flow_handler
[ 7581.811526] ieee80211 phy0: Hardware restart was requested
[ 7581.812863] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[ 7581.813342] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
I'm using the latest Xubuntu kernel
3.11.0-15-generic #23-Ubuntu SMP Mon Dec 9 18:17:04 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
Thanks for your help.
Source: (StackOverflow)