Public bug reported:
Binary package hint: xserver-xorg-video-intel
It crashes with the following in the kernel log, and the screen corrupts:
[drm:i915_get_vblank_counter] *ERROR* trying to get vblank count for disabled
pipe 0
This seems to normally happen when changing brightness, but not
guaranteed to happen when changing brightness.
Hardware: MacBook 2.1
Release: Ubuntu 9.04 amd64
ii xorg 1:7.4~5ubuntu13
X.Org X Window System
ii xserver-xorg-video-intel 2:2.6.1-1ubuntu4
X.Org X server -- Intel i8xx, i9xx display driver
** Affects: xserver-xorg-video-intel (Ubuntu)
Importance: Undecided
Status: New
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[i915] Brightness change crashes X
https://bugs.launchpad.net/bugs/340964
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