GNOME Bugzilla – Bug 580570
Backlight constantly powers off, with upgrade to 2.26.1
Last modified: 2012-03-23 09:49:38 UTC
Please describe the problem: I have g-p-m preferences set to never put the display to sleep and not dim when idle. These settings are the same for both on AC and on battery. Everything was fine. But after the upgrade to 2.26.1 the backlight on my (laptop) monitor started turning off all the time and somewhat randomly. Sometimes after just a second, usually after 30 seconds to 1 minute. If I disable dpms (with: xset -dpms), this serves as a workaround for the problem. I'm running Arch64. Six other people have reported the same problem on a thread I started in the Arch forums (see: http://bbs.archlinux.org/viewtopic.php?id=70733). Steps to reproduce: 1. Upgrade to g-p-m 2.26.1 2. Start laptop 3. Don't use keyboard or touchpad Actual results: Withing a couple seconds to one minute, the lcd backlight will power off, even though it's set not to. Expected results: Backlight to stay on. Does this happen every time? Yes. Other information:
additional information xorg-server 1.6.1-1
I noticed that the "Never" value seems to be the problem (both ac and battery), I mean... if I set the value to Never the screen goes blank after few minutes, but if I set it to something like 2 hours it seems to work good.
I did have it set on the "never" value and am also finding that setting it to 2 hours and 1 minute (the next highest setting), for display sleep, solves the problem. I am also using xorg-server 1.6.1-1
I set it to something around 5 minutes and it goes off between "imediately" and up to 1 minute. If I set it to never, display stays on. However a friend of mine (kulzer_AT_in_tum_de) sets it to never and the display turns off after a short while.
*** Bug 580638 has been marked as a duplicate of this bug. ***
The same for me. I have set "put display to sleep" to never when on ac power but it goes to sleep randomly after idle. From a few seconds up to 1 minute. But when I set it to 10 minutes it seems to work. [romanm@alpha BAT0]$ uname -a Linux alpha 2.6.29.1-desktop-4mnb #1 SMP Mon Apr 20 17:02:53 EDT 2009 x86_64 Intel(R) Core(TM)2 Duo CPU T5800 @ 2.00GHz GNU/Linux [romanm@alpha BAT0]$ rpm -qa|grep gnome-power-manager gnome-power-manager-2.26.1-1mdv2009.1 [romanm@alpha BAT0]$ rpm -qa|grep x11-server-xorg x11-server-xorg-1.6.1-1mdv2009.1