Bug 38081 - [snb] GPU/system hang
Summary: [snb] GPU/system hang
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) Linux (All)
: medium major
Assignee: Daniel Vetter
QA Contact:
Keywords: NEEDINFO
Depends on:
Reported: 2011-06-08 09:28 UTC by Alexander
Modified: 2017-07-24 23:04 UTC (History)
5 users (show)

See Also:
i915 platform:
i915 features:

Xorg.log (37.03 KB, text/plain)
2011-06-08 09:28 UTC, Alexander
no flags Details
kernel.log (294.29 KB, text/plain)
2011-06-08 09:29 UTC, Alexander
no flags Details
kernel.log_with_drm_debug (98.38 KB, text/plain)
2011-06-16 06:23 UTC, Alexander
no flags Details

Description Alexander 2011-06-08 09:28:37 UTC
Created attachment 47721 [details]

Hi I use linux kernel 3.0.0-rc2 with intel xorg driver build from git and sometimes X hung and I can't do anything. Couldn't check if this was only X server hung or whole system because I didn't have other machine to try to login on hang laptop via ssh.

I've attached Xorg.log and kernel.log. Please let me know if I should provide some more information to help in investigation of this bug.
Comment 1 Alexander 2011-06-08 09:29:16 UTC
Created attachment 47722 [details]
Comment 2 Chris Wilson 2011-06-08 09:47:30 UTC
Can you please attach /sys/kernel/debug/dri/0/i915_error_state after a hang?
Comment 3 Alexander 2011-06-08 09:51:11 UTC
I'll try after next hang
Comment 4 Alexander 2011-06-08 09:52:26 UTC
Should I compile kernel with any specefic debugging options to get this paramenter?
Comment 5 Chris Wilson 2011-06-08 10:23:48 UTC
You will need to compile in CONFIG_DEBUGFS and then mount -tdebugfs debug /sys/kernel/debug
Comment 6 Alexander 2011-06-16 06:23:00 UTC
Created attachment 48050 [details]

Still can't catch this issue and be able to look at debug fs in same time. But attached kernel log with enabled drm debugging, may be it will help in investigation
Comment 7 Alexander 2011-06-19 15:54:37 UTC
Seems I can't catch it because the whole system hangs along with GPU and I can't ssh on it to check the debug fs
Comment 8 Chris Wilson 2011-06-19 15:59:35 UTC
One last thing to try before resorting to netconsole and hoping that it is an ordinary OOPS...

Can you please add i915.reset=0 to your kernel boot parameters and cross your fingers?
Comment 9 Chris Wilson 2012-02-08 08:09:26 UTC
Looks like a mixture of everything here. Let's start by assuming that it is one of the semaphore/rc6/fbc issues, and update the kernel.
Comment 10 Daniel Vetter 2012-05-11 05:49:18 UTC

Please retest on kernel 3.4-rc.
Comment 11 Daniel Vetter 2012-08-22 15:52:12 UTC
Reporter is awol, presumably this is fixed with all the latest workarounds ...

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