Ubuntu :: Screen Doesn't Go Into Low-power Mode / What To Do?
Jan 26, 2011
I'm on 10.10 64 bit. I have my power management settings configured so that on AC power, after 0:30 the screen is supposed to go to sleep.
But the problem is that it never goes to sleep. The screen saver comes on after 10 minutes, as scheduled, but when I come back even after a long period of time, the screen hasn't gone to sleep (it hasn't gone into low-power mode).
Please let me know what specific config information I should provide to help debug this and I'll post it here.
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Aug 7, 2010
I was upgrade my PC's RAM to 4GiB on 32bit platform, the problem is when I set AGP appture size to 64 MiB suse was detect physical memory at 3.4 GiB but when I set AGP appture size to 32 MiB or lower physical memory was detected at 3.6 GiB but I can only boot with failsafe mode, desktop mode doesn't work and screen goes to blank and I want to use the whole 3.6 GiB.
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Jun 4, 2010
I use Squeeze with Xfce. My problem is that recently (after the xfce updates) the xfce power manager doesnt react to the power button - it is set to suspend. I dont have gnome-power manager or anything like it running.
If i reboot the computer, the power button will work but if i suspend and resume, it doesnt work again.
The computer is built on an Asus M3N78-VM mobo (2GB RAM/Athlon3200+ single core).
acpi_listen detects the button press.
Any thoughts?
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Jul 4, 2010
I recently read that windows 7 has come with a special "power saver" mode which will ensure your computer does not take up any more electricity than you needed ( Control panel -> system -> security -> Power options & select power saver power plan) , Does ubuntu have this feature ?
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Mar 16, 2011
So the power went out at my house recently, and my home theater PC seems to have taken a blow. We had it on a surge protector, which didn't blow so that's fine, but it keeps telling me its in low graphics mode, and I can't seem to fix it for the life of me. I could reinstall ubuntu, but I have a bunch of movies and music on that drive that I want to keep.
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Oct 8, 2010
Whatever settings I use in the power manager, (Ubuntu default Gnome Power Manager) nothing appears to change. Screen brightness does not change when moving the slider, but is reduced after 5 or 10 minutes (haven't timed it. Probably whatever is default) of inactivity, even though the reduce screen brightness checkbox is unchecked. The latter is pretty annoying when watching online TV streams, especially since the video also exits full screen mode when the screen brightness is reduced.
The weird thing is, as the title implies, that when booting in recovery mode with FailsafeX the power settings seems to work. At least the screen brightness varies as the slider is moved I should probably mention that it is possible even in normal mode to adjust the screen brightness by using the buttons for adjusting screen brightness on my laptop (Fn + arrow up/down)
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Jan 30, 2010
I've got my powersaver set to blank the screen after a few minutes. Can I set this up so that a password is required to release it?
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Feb 19, 2010
I work on Ubuntu 9.04 and our application requirement is not to go to power saving mode when application is running. I added ServerFlags section to /etc/X11/xorg.conf
Section "ServerFlags"
Option "blank time" "0"
Option "standby time" "0"
Option "suspend time" "0"
Option "off time" "0"
EndSection
This didn't help. Then I tried following commands
gconftool-2 -s /apps/gnome-power-manager/ac_sleep_display --type=int 0
gconftool-2 -s /apps/gnome-screensaver/idle_activation_enabled --type=bool false
I see that it works fine only if I change settings via Settings>ScreenSaver>Power Management in gnome. I wan to do this via script. Can I do this? Which file gets updated when I change display settings via Settings>ScreenSaver>Power Management.
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Feb 4, 2010
All of a sudden today there was no display on my Ubuntu PC. It seems to be powering on - I get the LG screen when the monitor is switched on - but it goes into "Power Saving Mode". How do I diagnose this? I already unplugged and plugged. Monitor is connected to a graphics card - no change when I switched to VGA.
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Apr 22, 2010
I have a new Lenovo (thinkpad) x100e laptop. I've recently installed the new Ubuntu 10.02 distro and have found the oddest bug. If my power cord is disconnected (i.e. if I'm running off battery power) then the login window locks up. Conversely, if the power cord _is_ connected then things work as usually. (Also, trying to adjust brightness causes a crash --- but I suspect that this is not odd). Where I should put this information.
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Jul 31, 2011
Out of nowhere my computer will not boot up. I get the message like this
NMI received for unknown reason 29 on CPU 0.
Dazed and confused, but trying to continue
Do you have a strange power saving mode enabled?
NMI received for unknown reason 39 on CPU 0.
Dazed and confused, but trying to continue
Do you have a strange power saving mode enabled?
I read something about it being the video card, so I took my old one out which it being an ati, an replaced it with an nvidia.
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Mar 16, 2011
I recently converted a Toshiba Satellite A75 notebook with a broken screen into a minecraft server that me and my friends will be using at UAB. It's currently running the latest version of Debian in text-mode with a few shell scripts that backup files and update a webpage at specified times.
The server runs fantastic ( though it's currently on my home network so no one can join it unless they are on LAN ) but there is a minor problem. I took a look at the backups from last night and it seems the server shut down around 10:00 in the morning because the laptop went into sleep/hibernate mode or something like that. I'm not sure what's causing this exactly but I think it's some setting in gnome-power-manager, but I can't run it in text mode.
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Mar 31, 2010
I have to questions: I am new with Linux and using ubuntu on my laptop computer. when i reopen my leptops cover after i closed it, meaning - putting computer to sleep, every thing is working, but the screen is black and nothing is seen. No matter what i tried to do, i cant make it to "wake up".
Using the computers battery, with no electric supply, the battery time is only half of what i get when using windows. i tried using less lumination but it didnt seem to help.
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Nov 21, 2010
when my monitor turns off after 30 minutes, I cannot do anything after. We're talking complete lock down of Ubuntu 10.04 64-bit. Not even alt+printscreen+REISUB reboots the machine; I have to do a hard reboot (which sucks and is hard on hardware).
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Aug 17, 2011
I am running a version of Ubuntu 10.4 with XFCE loaded (actually Qimo, a distribution for kids). I am using a pci wireless card with a broadcom 43XX chipset and WPA2 authentication using the Broadcom STA driver. In an account with privileges I set the auto eth1 (which is what my wireless card comes up as) to connect automatically, and make available to other users.
When I switch to the kid's account, the wireless connects just fine. Then, if the computer is not used for a period of time, the powersavings mode kicks in. When the computer is woken up, the wireless connection does not attempt to reconnect. If you right click on the networking icon it doesn't even show any available connections, even though it can be found by clicking edit connections. The only way I can get it to reconnect is to restart the machine (I will admit that I did not try to restart the networking service, I will try that tonight).
Any ideas? This has been driving me nuts for a few days now. The users during the day are non technical and can't deal with these kind of issues. I can post more details about the setup (as recommended by the sticky post) tonight. I am at work at the moment and can't get to the machine from here - because it has removed itself from the network again.
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Dec 27, 2015
I've recently changed to Debian from Windows, it's a really great adventure so far, but I have one problem. So as I see you can set your monitor into "Blank Page" after 10 or any minutes to save power, like in Windows. 10 minutes passes, without any movement my monitor's led turns into orange and the monitor turns off, that's great, that's what i want.
But after a few seconds the led turns green (like when it's on), and it brings up a little box : "Power Saving Mode" (just like it did after 10 minutes), and it turns off, and then stars again from the beginning . And this goes on repeatedly until a move my mouse to get back from "Blank page" state. (It's like the monitor tries going into power saving mode, but it gets always a little bit of power, to show that text box, and start all over.) So what can I do? I use debian 8.0 "jessie", and my monitor is a LG L1750S(with Nvidia GeForce 9600 GT).
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Jan 26, 2009
I have a Dell Precision T3400 workstation (Nvidia Quadro NVS 290) with the kmod Nvidia driver installed. Everything works fantastic for power saving, the screen saver comes on , then the monitor blanks after a while. The only problem is that the monitor itself (Dell E228WFP) never goes into standby. The power LED stays green instead of orange. Worked fine under FC8, only noticed it recently under FC10.
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Jan 8, 2011
i am trying to install rhel 6 (86*64) on my windows 7 (AMD Sempron 145 processor) using DVD iso image. after selecting keyboard language and it goes to ther rest of the process for 20 seconds and then the monitor goes to power save mode. trying to input with keyboard or mouse does not seems to be helping. i have changed my windows 7 powersave options to "never".
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Nov 24, 2008
I have a few machines set up and running Red Hat 4.1.2-42 in a computer lab. I also have a single test machine running the same version. The machines in the lab work flawlessly.However, when machines are on the login screen, they don't go into power saving mode. That is, after a certain amount of inactivity, the idle login screen should be replaced by a black power saving screen. But this does not happen. The monitor should go into standby (the little green light becomes orange, and the whole screen shuts down until you move your mouse again...you know the drill).I know this is supposed to be the case because this works on the test machine. It just doesn't work in the lab. I think it has something to do with gdm, but I can't for the life of me figure it out.
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Feb 9, 2010
Can't adjust brightness of display on buttery power mode Have no controller, such as in the tab "On AC Power"
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Jan 4, 2011
Ubuntu 10.10 doesn't boot at all. The liveCD only boots once every like 30 attempts, installing from liveCD froze, but the Alternate CD worked and installed ubuntu. Now when I try to boot into it using GRUB, it freezes at the beginning of the boot process.With normal boot it freezes at line: Starting AppArmor profiles Skipping profile in /etc/apparmor.d/disable: usr.bin.firefox.With recovery mode it freezes even before showing me anything
A little kinda like the liveCD, if I try like 30 times, it might manage to boot once in normal mode.That line keeps on repeating, the the xxx.xxx integer changes each time, and this goes on forever.I tried removing my floppy drive, but it didn't help.I tried to boot with fd0=noprobeThe one time it booted, when I restarted, it froze while trying to restart.
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Apr 10, 2010
I've only recently switched to Ubuntu and overall I'm loving it. When i first installed it shut down perfectly from the GUI. After updating from the Update Manager, I've had problems. Now it shuts down but my PC doesn't power down.
I can manually make it shut and power down from the terminal with the command:
sudo shutdown -h -P now
or:
sudo poweroff
The fact that it works from the Terminal but not from the GUI suggests there might be a coding problem with the GUI but discovering and fixing that is way beyond my capabilties.
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Oct 19, 2010
I previously had Ubuntu server 9.04, 9.10 and 10.04. I use it as a headless server and the power button had always worked.at first, I updated from 10.04 to 10.10 and everything was working great but I decided to reinstall the os on a new HDD. then when I want to shutdown the server, I need to login with ssh and shutdown it with "halt -p", the power button doesn't do anything. I connected a monitor to the server to see what's happen on the screen but nothing... no message. nothing in the error log.I tried to add apm force_off=1 in the /etc/modules but still not working.
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Oct 24, 2010
i'm curently compressing a big 100GB file with 7zip on a system with an intel 2,66Ghz quadcore processor. Allthough 7zip uses 4 cores to compress the file, it still uses only about 40% of the cpu performance. The cpu isn't doing anything else, nothing heavy anyway.
I started compressing 8 hours ago and the compression is currently 47% done. Reading and writing the files isn't very fast so my harddrive isn't slowing the process down.
So what's the holdup? There is still 53% of work to be done. Is it for some reason impossible to do this faster?
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Dec 10, 2010
I've had this problem for a while and have eagerly awaited a fix, but have not received one. But the problem is when I'm either charging or on battery and I would click on the power manager the menu that pops up shows me the percentage of life remaining but does not give me any indication of how long I have until my battery is dead/fully charged.If I were to open up the Power Statistics window there is no information time to full or time to empty. Both are just empty.
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Jun 15, 2009
I just upgraded from FC10 to FC11 (32-bit) on an old Dell laptop. I set my power management settings (in Gnome) to turn the monitor off after some idle period but always leave the computer running and the hard drives powered. I also set my screen saver to a blank screen. I noticed that the screen saver does come on (turning the screen black), but the monitor back lighting never goes off. I tried different idle times for the power management settings (I usually set it to 1 min, but some other posts implied that 11 mins might work). I should also mention that this is after I've logged into a user account, not sitting at the login screen.
I didn't have this problem in FC10 (the monitor would actually turn off) so I figured it was a bug in FC11, but I can't seem to find a thread addressing this issue. I've found some what similar threads, but none mentioning this particular problem.
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May 12, 2010
I have an issue where the screen on my laptop will not shut off with the power management tool. The Default Power Manager does not have an option for this.My screen will go blank after a set amount of time, but the lcd-backlight will remain on. I would want the power manager to shut the screen off completely (including turning off the lcd backlight) without shutting down the computer it-self. So the computer can continue to do what I left it to do in the case I forget to close the lid. With the screen shut off completely, will preserve the life of the back light and reduce power consumption.
Is there a better power manager app that will allow me to do this a tweak to the existing default power manager that will allow the functionality I am seeking? laptop was perfectly able to do this under a win-xp environment, so I know the machine is physically capable of doing this. Note: My WinXP OS and Ubuntu OS are on seperate physical drives so there is no dual boot issues. So when I am using one there is no trace of the other present
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Jun 27, 2010
In Ubuntu 10.04: if the screen has been locked (automatically by the screensaver or user-activated using the top-right menu) pressing the power button doesn't initiate shutdown. Is this a bug or is it a configurable option?I would expect to either get the usual 60 second shutdown delay or a graceful shutdown right away.
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Jan 18, 2011
I am building a small Ubuntu box made for our clients to listen to an audio stream. At startup, I have scripts that start the audio stream, then locks the screen so clients can't change any settings. It works flawlessly.
However, if a client has to shut down the box, they can't. Note this is a headless unit, no monitor, keyboard, or mouse. It will ONLY be used to play streaming audio. I need for the client to be able to safely shutdown the unit by pressing the power button. But, when the power button is pressed, ubuntu asks for the user password. Is there a way to just make the system shutdown without entering a password?
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May 25, 2010
I have LucidLynx installed on my eeepc 1005PE. I am currently using it under the gnome interface but i also have the notebook version of it installed (probably because i got a notebook remix of it, not quite sure). All is well except for the following: after i power up my notebook, login and i can see the panel i plug the power cord in. And the my screen starts flickering in orangeblack colors. Nothing i do seems to take it out of this state but a good old hard-reboot.
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