Bug 13500 - External display turns off randomly
Summary: External display turns off randomly
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/intel (show other bugs)
Version: unspecified
Hardware: x86 (IA32) All
: medium normal
Assignee: Hong Liu
QA Contact: Xorg Project Team
Depends on:
Reported: 2007-12-03 09:42 UTC by Andreas Kloeckner
Modified: 2007-12-18 07:18 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

Log file (52.29 KB, text/x-log)
2007-12-03 09:43 UTC, Andreas Kloeckner
no flags Details
config (3.13 KB, application/octet-stream)
2007-12-03 09:43 UTC, Andreas Kloeckner
no flags Details

Description Andreas Kloeckner 2007-12-03 09:42:35 UTC
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. ---
Architecture: i386
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
Comment 1 Andreas Kloeckner 2007-12-03 09:43:11 UTC
Created attachment 12916 [details]
Log file
Comment 2 Andreas Kloeckner 2007-12-03 09:43:41 UTC
Created attachment 12917 [details]
Comment 3 Andreas Kloeckner 2007-12-03 09:45:30 UTC
I should add that this is on an i915 in a Thinkpad R52.
Comment 4 Andreas Kloeckner 2007-12-03 10:02:43 UTC
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.
Comment 5 Michael Fu 2007-12-03 23:17:02 UTC
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.
Comment 6 Andreas Kloeckner 2007-12-18 07:18:11 UTC
This hasn't happened in a while, consider it fixed for now.

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