standby interview questions
Top standby frequently asked interview questions
Sometimes when my computer wakes from standby the screen stays blank, and no matter how much wiggling of the mouse or hitting keys I do it won't 'wake up' the monitor. My only option is to do a cold restart, which loses any unsaved info etc.
Has anyone come across this issue?
Source: (StackOverflow)
Does Windows flush the drive caches when entering standby mode?
It seems like an obvious thing to do and I for one would design it like that if I were on the Windows team, but over the years, I have learned not to make such assumptions.
I only managed to find a single page that asked this (in regards to XP), but no answer was given, just a generic response.
Is there any sort of definitive information that Windows flushes disk caches on standby?
Source: (StackOverflow)
I have a buggy driver for my Wifi USB dongle.
Every time the computer wakes from standby, the wifi is disabled.
I created a script to restart the device, but I have no idea how to automatically run it when wake from standby.
I'm using Widnows 7 x64.
Source: (StackOverflow)
Whilst browsing the interwebs, I found an article here about how to run a Power Efficiency Report. As I wasnt doing anything, I decided to try it and see what it did.
In the results it listed the following four sleep states with true of false next to them showing if my PC supports it;
I just wondered, what are the differences between these sleep states?
Thanks
Source: (StackOverflow)
I want to know the uptime since the last wake from standby.
The command uptime only shows the difference between current time minus the last startup time.
Source: (StackOverflow)
I used to have my desktop Windows XP pc go to standby (S3 suspend, I think?) when it idled for over an hour or so. Now I charge my iPhone 3GS from a USB port, often right when I go to bed. Ideally I'd like to save electricity by having the computer go to standby as soon as the phone is done charging.
Is this possible? Is it a pipe dream?
I am open to whatever crazy solutions might work, including jailbreak apps working over my wifi network.
Edit:
The reason I don't use the included charger is that I want to avoid buying another piece of junk that will eventually hit the landfill. Rather than buying car chargers for everything, I have a power inverter in my car, and the AC charger stays there. (I did buy an extra data cable.) So I'm looking for a solution that does not involve buying any hardware (nor moving my wall charger around every day).
Also, the iPhone 3GS won't charge from most USB chargers such as the ones linked in the answers so far.
Source: (StackOverflow)
I have been using an ASUS M2NPV-VM motherboard for main home desktop workstation, operating Windows Vista x64. This computer has right from day one not been able to enter hibernate or standby; after Windows performs its final actions and brings the machine down, it would automatically revive itself for a reboot.
Updating to the second latest BIOS (1201)has not helped (the latest BIOS revision would induce video refresh problems rendering it unusable). I have been reading related discussions on incidents similar to mine to no avail of a true workable solution. They appear to be more speculative guesses rather than actual knowledge on the inner workings of motherboard hardware.
Does anybody have any electronic engineering experience on PC energy-saving standards to provide a more informed opinion how to go about getting this to work?
More stories: this motherboard could not even reboot properly the first thing i used it. It was due to refresh rate of the onboard GPU, which had no influence on the sleep/hibernate issue here. But right now, i have been using an add-on PCI-E video card and disabled the onboard chipset. That has not changed the situation.
Source: (StackOverflow)
I've noticed that my computer doesn't want to stay in standby or go to standby after x minutes (as set in my Power Options). Running powercfg -requests tells me that my audio driver is keeping my computer awake... "An audio stream is currently in use"... similar to what was seen in question/answers to uTorrent prevents computer from entering sleep state. Except I'm not running uTorrent, nor any torrenting application.
I know I can (and have, for now) set an override with powercfg -requestsoverride "<audio driver name>" system, but I'm more curious about what is keeping an open audio stream. The only applications I have left open while away are Steam and Trillian. My only guess is that Steam is the culprit because it has an entry in the Volume Mixer, but I can imagine that any application that could play audio at any time might have an entry in there, even if it's not currently using an audio stream.
Is there a way to tell which application(s) is currently using an audio stream (and thus keeping my computer awake)? If it is any help, my hardware/driver is Realtek High Definition Audio.
Additionally, and this is probably asking too much, is there a way to keep known naughty applications from keeping the computer awake? For example, as seen in the comments below, Steam was the culprit, but it shouldn't be hogging an audio stream the whole time just for the chance that I get a message. (I'm assuming this is a bug in the latest version of Steam since this was not an issue in the past.) But I don't like having override set for all audio because, e.g., I could have music playing in VLC or something in which case I don't want my computer to standby.
Source: (StackOverflow)
Does anyone know of a way to clear standby memory without a reboot?
I can't launch my HyperV VMs after doing other tasks in Win 10 after running tasks due to the lack of free memory. I would have enough memory (free + standby), but HyperV doesn't seem to count the standby RAM as available for the VM.
Source: (StackOverflow)
When a Windows 7 32-bit PC attached to a domain comes back from standby mode and has no user logged in, if I log in once, it jumps back to the login screen. If I log in for a second time, then it actually logs in.
This happens on multiple PCs, and is not a hardware issue. The PCs are also free of viruses/malware, and are otherwise Problem-free.
Why does it do this, and is there a way to prevent this annoyance?
Source: (StackOverflow)
I often leave the PC running into the night to process video files, so it shouldn't sleep while it's working but it would be nice if it went into sleep when it's done.
During the export the CPU is always above a set %, and when idle it's typically in the single digits.
Is there some tool or setting that would prevent the PC from going to sleep as long as the CPU usage (let's say averaged over one minute) stays above a specified limit?
Source: (StackOverflow)
As long as computer is operating, OS constantly performs small writes to storage medium. This is what I have not paid attention to earlier until I saw total writes in CrystalDiskInfo, Intel Toolbox and writing activity in Windows 7 Resource Monitor:
As you can see, rtvscan process which is Symantec Endpoint Protection is performing almost 1MB/s writes and is scheduled to run once every week with full system scan which I wonder whether should replace with another less-resource intensive antivirus. I am not yet knowledgeable about Host Writes, NAND Writes and difference between both, but considering I have been using SSD only for 2 weeks with mostly browsing, over 180GBs is a lot of writes.
If my assumptions are correct, I reckon just by having computer idle with OS running (which often is case with mine) will continue wearing out SSD, hence not forgetting to put machine on Standby or even Hibernation if you know you won't use computer for long will reduce unnecessary writes and prolong SSD's life.
Source: (StackOverflow)
Ever since I upgraded to the Windows 8.1 beta (and even now with the Windows 8.1 RTM), my computer will not idle to sleep. This wouldn't be that much of a problem since I almost always remember to put it to sleep before walking away. But sometimes the computer will wake on its own through a scheduled task, and then the computer will stay on until I return to it. (By the way, I'd rather not disable scheduled tasks from being able to wake the machine.)
The computer is set to sleep after 30 minutes of inactivity. I have set the Power Option "When sharing media" to "Allow the computer to sleep." I have deactivated all "wake_armed" devices so that
powercfg /devicequery wake_armed
returns
NONE
I have installed all the drivers Windows couldn't automatically detect (of which there was only my "Creative Game Port"). Finally, I have generated a report from
powercfg /energy duration 3600
Originally, it informed me of a few problems, such as the "When sharing media..." setting. As I said earlier, I have now set the "When sharing media" setting to "Allow the computer to sleep." Here is the report, which seems to suggest that I have no further serious problems:
https://skydrive.live.com/redir?resid=3D3292D8A7DEC2F4!17449&authkey=!AIllZ4c3A8_-XHU
SkyDrive will probably show the HTML upon clicking above. Try clicking Download and then opening the file. Thank you for your help.
Source: (StackOverflow)
Whenever I want to standby or hibernate Windows 7, It takes some times in blank monitor and gives a blue screen error and shuts down. Details below about Error message that Windows showed:
Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7600.2.0.0.256.1
Locale ID: 1033
Additional information about the problem:
BCCode: 9f
BCP1: 0000000000000003
BCP2: FFFFFA800744B060
BCP3: FFFFF800048D0748
BCP4: FFFFFA8008539460
OS Version: 6_1_7600
Service Pack: 0_0
Product: 256_1
Files that help describe the problem:
C:\Windows\Minidump\090910-33961-01.dmp
C:\Users\Ali\AppData\Local\Temp\WER-120869-0.sysdata.xml
Read our privacy statement online:
http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409
If the online privacy statement is not available, please read our privacy statement offline:
C:\Windows\system32\en-US\erofflps.txt
How do I repair that and what's the problem's origin?
Source: (StackOverflow)
Just a simple theoretical question:
- Does increasing the amount of
physical RAM on a laptop affect the
battery life while in standby?
I always thought the only real difference between hibernate and standby was that standby still had to power the RAM to keep memory and a tiny bit of CPU, while hibernation allowed the RAM to power off by dumping the memory on hard drive which would keep that data even when turned off (at the cost of time in transporting the data).
Source: (StackOverflow)