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display-resolution interview questions

Top display-resolution frequently asked interview questions

Screen Resolution Problem with Ubuntu 14.04 and VirtualBox

Environment: Lenovo T530 running Windows 7. Have installed Ubuntu 14.04 on a virtual machine using VM Virtual Box. Have installed all the updates from both Virtual Box and Ubuntu.

Problem: While in Ubuntu's desktop and other Ubuntu initiated programs, the window is reduced to about 3x4 inches showing in the middle of the rest of my regular Virtual Box window. I am seeing only the upper right hand of the screen output of what I would normally see. Please help.

I've seen How do I install Guest Additions in a VirtualBox VM?

But, none of these answers works in 14.04.


Source: (StackOverflow)

Adapt Ubuntu to a high-DPI resolution screen

What are the steps you need to adapt Ubuntu on a fresh installed Laptop with a high resolution display?

I have a display with 3200x1600px on only 11'' which is all realy tiny.


Source: (StackOverflow)

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cannot change screen size from 640x480 after 14.04 installation on VirtualBox OSX [duplicate]

This question already has an answer here:

After installing Ubuntu 14.04 guest on VirtualBox running on a Max OSX host, I am stuck with 640x480 screen resolution. Adding guest additions again doesn't help. Previous Ubuntu installations are fine with bigger resolution. The 'Detect Displays' button on the 'Display Settings' Settings screen is not reachable, because 640x480 is too small. I could not find a /etc/X11/xorg.conf file to configure manually.


Source: (StackOverflow)

Higher screen resolution in VirtualBox?

I've just installed Ubuntu 10.04 into VirtualBox on Windows 7.

Unfortunately the only options showing for screen resolution are 640x480 and 800x600 and the monitor is showing as 'Unknown'.

How would I go about upping the resolution to 1280x1024 (I'm on a 1600x1200 monitor)?

Update
I tried mounting the VirtualBox 'Guest Additions' ISO (from the VBox 'Devices' menu) and doing sudo sh ./VBoxLinuxAdditions-x86.run from the mounted drive, which gave 2 new listed resolutions after a reboot (1024x768 and the 16:9 version of that resolution). These worked when I selected them but disappeared when I switched back to another resolution. I tried rebooting and running VBoxLinuxAdditions-x86.run again but onlu the 2 low res options listed this time.
I think I'm going to reinstall...

Seems to be a VBox problem rather than an Ubuntu problem as after reinstalling 10.4 overwriting the original virtual partition, sudo sh ./VBoxLinuxAdditions-x86.run now has no affect at all.


Source: (StackOverflow)

Ubuntu 14.10 does not install in virtualbox

I'm currently running Windows 8.1 x64 (a problem in itself that I can't change sadly ;-P) with the latest version of VirtualBox (4.3.18 r96516). I managed to get the server version up and running with no issues but I cannot get the desktop version running.

I can boot to the menu and start the process (select the option to install and/or try) and it will get through the inital Ubuntu 14.10 loading screen (with the progess "bar/dots") but then we get to a nasty screen of distorted colors and that's it.

My hypothesis is that the display driver/server isn't working with VirtualBox and what I'm essentially seeing is the display in a crappy mode (16colors@62x24) because I am able to see a perfectly fine screen with cursor working and everything and then suddenly I'm in that nasty screen. The mouse does show up (nasty looking and filling the entire screen) but nothing else.

Here is a screenshot:

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Here are my settings in an album (I can add more if desired but I put in what I thought were the most relevant):

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Source: (StackOverflow)

Higher screen resolution for VirtualBox?

I have been trying this for a while but no luck. I installed ubuntu-11.10-desktop-i386 twice. Also installed guest additions. However I always get maximum screen resolution as, 1024 x 768.

Do I need to change anything in /etc/X11/xorg.conf file (example)? Presently there is no such file in that path. Also, would you be able to advise me what the contents of the file for 11.10 version should be?


Source: (StackOverflow)

Is it possible to have two different DPI configurations for two different screens?

I'm using Ubuntu 12.04.3 with NVidia drivers (319) for my Quadro K2100M graphic card, and when I switch my main 3200x1800 laptop screen to mode 1920x1080 (using nvidia-settings), the display goes blurry...

I am using two screens:

  • My main screen is a LCD with max resolution 1920x1200.
  • My laptop screen (original resolution 3200x1800) is sitting to the right of that.

The main problem is that, on Ubuntu, the font is far too small on my laptop screen. Because of that, I wanted to change the resolution of my laptop to 1920x1080.

Reading Galgalesh answer I tryed to compute my DPI and here is the DPI configuration which I should have :

  • 94x94 for my main LCD screen 1920x1200
  • 235x236 for my 3200x1800 laptop screen

Is there a way to have dual DPI resolutions with an extended desktop?


Source: (StackOverflow)

How to set the monitor to its native resolution which is not listed in the resolutions list?

After installing Ubuntu 10.04 with my Samsung SyncMaster B2030, native resolution (1600X900) is not found in the list of resolutions.


Source: (StackOverflow)

Wrong Login Screen Resolution

Excuse me if this has been answered already, but I couldn't find any questions quite matching my issue.

On the odd occasion, usually after incorrectly restarting my computer, my login screen resolution is not the default 1440x900, but I think 1600x900. Now, I have this monitor that's really bad at handling resolutions it's not designed to handle, and will show a silly "wrong resolution" box jumping around the screen.

Is there any way to make the login screen load a 1440x900 resolution no matter what? I'm running Ubuntu 11.10 with Unity and LightDM.


Source: (StackOverflow)

How to change the screen resolution when using RDesktop?

How to change the screen resolution?

I type the command

 rdesktop "server ip"

but the screen does not appear large.


Source: (StackOverflow)

How do I safely change grub2 screen resolution?

I did a fresh install of Ubuntu 11.04 on a HP 550 Notebook. But grub2 isn't really fit in the best screen resolution that this Notebook can support (1280x800).

How can I do this without using a third party application ?


Source: (StackOverflow)

GRUB2: Use maximum detected resolution?

How do I tell GRUB2 to set its resolution (and also the one passed to the kernel) to the maximum one it can detect at time of boot?


Source: (StackOverflow)

Add Fake Display when No Monitor is Plugged In

I have an Ubuntu 14.04 server that has no external monitor connected. I use NoMachine to remote control the machine. When I do so, the Unity/Gnome interface doesn't see any monitors connected, so I can only use 800x600 when connecting with NoMachine. If I plug in a monitor, I can set the resolution to whatever size the NoMachine window is on the remote computer.

Is there a way to create a "fake" monitor device on Ubuntu so I can set a desktop resolution in Unity/Gnome?


Source: (StackOverflow)

How to add display resolution fo an LCD in Ubuntu 12.04? xrandr problem

I am new to Ubuntu. I have installed Ubuntu 12.04 and am stuck trying to set up the correct resolution for my LCD display.

The native resolution for the LCD is 1920x1080

here is the output from xrandr:

$ xrandr
Screen 0: minimum 320 x 200, current 1280 x 720, maximum 4096 x 4096
LVDS1 connected 1280x720+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1280x720 60.0*+
800x600 60.3 56.2 
640x480 59.9
VGA1 disconnected (normal left inverted right x axis y axis)

Then I create new modeline:

$ cvt 1920 1080 60
1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz
Modeline "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync

So far so good. Then I create new mode using xrandr:

$ xrandr --newmode "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync

But for some reason that new mode was created for VGA (VGA1) output instead of LCD output (LVDS1):

$ xrandr
Screen 0: minimum 320 x 200, current 1280 x 720, maximum 4096 x 4096
LVDS1 connected 1280x720+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1280x720 60.0*+
800x600 60.3 56.2 
640x480 59.9 
VGA1 disconnected (normal left inverted right x axis y axis)
1920x1080_60.00 (0xbc) 173.0MHz <---------- ????!!!!!!
h: width 1920 start 2048 end 2248 total 2576 skew 0 clock 67.2KHz
v: height 1080 start 1083 end 1088 total 1120 clock 60.0Hz

So, if I try to add mode to LVDS1, I get an error:

$ xrandr --addmode LVDS1 "1920x1080_60.00"
X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 149 (RANDR)
Minor opcode of failed request: 18 (RRAddOutputMode)
Serial number of failed request: 25
Current serial number in output stream: 26

Adding that new mode to VGA1 works fine, but I don't use that VGA1 output.


Source: (StackOverflow)

How to enable 1280x800 resolution in tty?

I've got Toshiba U500 (nVidia). Tried changing /etc/default/grub in many ways, now I've got:

GRUB_DEFAULT=5
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="vga=0x014c"
GRUB_CMDLINE_LINUX="vga=0x014c"
GRUB_GFXPAYLOAD_LINUX=1280x800x16

0x014c is what vbeinfo in Grub related to 1280x800x16

I just wish my laptop could boot with nice, high resolution font and let tty consoles stay that way... How is that possible?

Regards, gocio


Source: (StackOverflow)