|Summary:||mplayer using -vo gl can crash X server when resizing|
|Component:||Driver/intel||Assignee:||Chris Wilson <chris>|
|Status:||RESOLVED FIXED||QA Contact:||Xorg Project Team <xorg-team>|
|i915 platform:||i915 features:|
Description mctiew 2011-10-04 00:56:02 UTC
This is 100% repeatable situation. When option "Shadow" "True" is removed then X server does not crash. Kernel 3.0.4, xserver-xorg-video-intel 2.16.0-1 debian based system. I am using this xorg.conf :- Section "Device" Identifier "Intel 945G " Driver "intel" Option "Shadow" "True" EndSection Section "Monitor" Identifier "LVDS" Option "PreferredMode" "1280x800" Option "Position" "0 224" EndSection Section "Monitor" Identifier "VGA" Option "PreferredMode" "1280x1024" Option "Position" "0 0" EndSection Section "Screen" Identifier "Default Screen" Device "Intel Corporation 945G Integrated Graphics Controller" DefaultDepth 24 SubSection "Display" Depth 24 Modes "1280x1024" "1280x800" "1024x768" "800x600" "600x480" EndSubSection EndSection
Comment 1 Paulo Zanoni 2011-10-28 06:33:14 UTC
Why are you using option Shadow? From the man page (man intel): Option "Shadow" "boolean" This option controls the use of GPU acceleration and placement of auxiliary buffers in memory. Enabling the Shadow will disable all use of the GPU for RENDER acceleration and force software- fallbacks for all but updating the scan-out buffer. Hardware overlay is still supported so Xv will continue to playback videos using the GPU, but GL will be forced to use software ras‐ terisation as well. This is a last resort measure for systems with crippling bugs, such as early 8xx chipsets. It is still hoped that we will find a workaround to enable as much hardware acceleration on those architectures as is possible, but until then, using a shadow buffer should maintain system stability. Default: Disabled This may be a bug, but if your system works fine without this option, you might consider removing it...
Comment 2 mctiew 2011-10-28 13:40:47 UTC
If I don't use "shadow" I have a bigger issue, the GPU hang from time to time. I will get this instead :- [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
Comment 3 Paulo Zanoni 2011-10-28 14:00:24 UTC
(In reply to comment #2) > If I don't use "shadow" I have a bigger issue, the GPU hang from time to time. > I will get this instead :- > > [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung Do you have a bug report for that too? What's the number? For your case, fixing the gpu hang will be a much better solution than fixing the "Shadow" option.
Comment 4 mctiew 2011-10-28 16:54:19 UTC
The GPU hang thing there is no lack of bug reports, and I haven't seen any fix yet. It's a intermittent issue and hard to repeat. Whereas this bug is 100% repeatable. Yeah I agree with you it is better to be able to fix the GPU han compared to this Xserver bug, however "wish to fix" and "actually able to fix" is a totally different issue. This bug has been filed and I haven't even seen any attempt to "respond" to it yet, whether to ignore this bug or to fix this bug, what make you think that other bugs filed will be fixed ?
Comment 5 Eugeni Dodonov 2011-11-03 14:27:38 UTC
I believe that if the bugs won't be filled, certainly they won't be fixed... If you can reproduce the GPU hang bug, please, fill in the issue as explained at http://intellinuxgraphics.org/how_to_report_bug.html. The i915_error_state is really important, it can explain why the hang happens. If you want, please, send me or Paulo a direct mail as well when you do, so we could follow up with it faster. Thanks!
Comment 6 Chris Wilson 2011-11-09 08:25:42 UTC
The original bug should in theory be fixed by commit 463dd87062edaa974cb8c7163328a53197f237e1 Author: Pauli Nieminen <email@example.com> Date: Thu Sep 22 18:38:53 2011 +0300 xf86/modes: Fix shadow rotation crashing when screen pixmap changes Driver may change screen pixmaps after page flipping that would then make damage lose track of the root pixmap. Using root window for shadow damages fixes the problem because SetWindowPixmap is implemented in shadow code. Signed-off-by: Pauli Nieminen <firstname.lastname@example.org> Reviewed-by: Keith Packard <email@example.com> Signed-off-by: Keith Packard <firstname.lastname@example.org> Without details of the GPU hangs (which are extremely rare on 945g) we can not do anything towards fixing them.