Bug#550621: Screen blanks unrecoverably once in a while
On Sun, Oct 11, 2009 at 17:10:35 +0100, Jurij Smakov wrote:
> For a while now (probably, since upgrade to kernel ~2.6.30 and/or
> newer xorg packages, my laptop (Dell XPS m1210) has been suffering
> from the following problem: once in a while (roughly once a day) the
> screen in X goes completely blank (but remains backlit). I can switch
> to a virtual terminal and kill/restart X, but it comes up with a
> blanked screen again, and only reboot can resolve the problem.
>
> Video card is "Intel Corporation Mobile 945GM/GMS, 943/940GML Express
> Integrated Graphics Controller", PCI ID 8086:27a2. lsmod shows that
> i915 and some related modules are loaded. I'm attaching two Xorg.0.log
> files: one for the original invocation (Xorg.0.log.original) and one
> corresponding to a restart attempt after the screen goes blank
> (Xorg.0.log.second). On the second attempt the following line shows up
> in the dmesg output:
>
> [drm:i915_get_vblank_counter] *ERROR* trying to get vblank count for disabled pipe 0
>
> Let me know if I can provide any further debugging information.
>
Can you track down when this started happening? Does it still appear
with kernel .31 or .32-rc? The output of intel_reg_dumper (from the
xserver-xorg-video-intel-dbg package) in working and non-working states
might help as well.
Cheers,
Julien
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