Ever since I upgraded to Debian's xserver-xorg-video-intel 2.2.0-1, my external VGA display turns off randomly while in X. I use compiz. This issue seems to occur more frequently while playing back Flash video, but other workloads (gvim) cause it, too. Switching to console and trying Fn+F7 (BIOS output switch) does not manage to revive the external display, and neither does restarting the X server. Only a full reboot helps. :-(
--- System information. ---
Kernel: Linux 2.6.23
--- Package information. ---
Depends (Version) | Installed
libc6 (>= 2.6.1-1) | 2.7-2
libdrm2 (>= 2.3.0) | 2.3.0-4
xserver-xorg-core (>= 2:1.4) | 2:1.4-3
Created attachment 12916 [details]
Created attachment 12917 [details]
I should add that this is on an i915 in a Thinkpad R52.
It seems that the retrace signals are generated properly--the external LCD knows what the resolution and refresh rate are supposed to be--there are just no pixels shown.
Note that the bug occurs only sporadically--sometimes it takes an hour for it to show, sometimes only a few minutes.
could you try to turn off framebuffer compression and retest? I'm asking because it might be a dup of bug# 13418...
a log file with "modedebug" option turn on will also be helpful.. thanks.
This hasn't happened in a while, consider it fixed for now.