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* GPU hung with Linux-3.2-rc6
@ 2011-12-21 18:54 Udo Steinberg
  2011-12-21 20:00 ` Keith Packard
  0 siblings, 1 reply; 11+ messages in thread
From: Udo Steinberg @ 2011-12-21 18:54 UTC (permalink / raw)
  To: intel-gfx, Linux Kernel Mailing List, dri-devel

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Hi,

With Linux-3.2-rc6 I'm frequently seeing GPU hangs when large amounts of
text scroll in an xterm, such as when extracting a tar archive. Such as this
one (note the timestamps):

[22865.157750] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
[22865.157763] [drm:kick_ring] *ERROR* Kicking stuck semaphore on render ring
[22871.165992] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
[22871.166008] [drm:kick_ring] *ERROR* Kicking stuck semaphore on render ring
[22877.417902] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
[22877.417915] [drm:kick_ring] *ERROR* Kicking stuck semaphore on render ring
[22883.426132] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
[22883.426146] [drm:kick_ring] *ERROR* Kicking stuck semaphore on render ring

These hangs did not occur with Linux 3.1 or they were so infrequent that I
didn't notice them. The machine is an x220 laptop with SNB CPU. The kernel
command line contains:

i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1

Note that VT-d is enabled in the BIOS, but the kernel is compiled without
IOMMU support. Because the IOMMU is not enabled, I'm inclined to think that
this problem is not VT-d related.

Cheers,

	- Udo

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^ permalink raw reply	[flat|nested] 11+ messages in thread
end of thread, other threads:[~2012-01-02 21:30 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2011-12-21 18:54 GPU hung with Linux-3.2-rc6 Udo Steinberg
2011-12-21 20:00 ` Keith Packard
2011-12-21 21:26   ` Udo Steinberg
2011-12-21 22:55     ` Keith Packard
2011-12-22  0:45       ` Udo Steinberg
2011-12-22  8:22         ` Daniel Vetter
2012-01-02  7:09           ` Udo Steinberg
2012-01-02 21:30             ` Daniel Vetter
2011-12-22 17:00         ` Keith Packard
     [not found]           ` <CAC7Lmnu7=7Y0K6zfmFsv_yPk_XAujNw6+D_B5vzpqhcQb27yhg@mail.gmail.com>
2011-12-23 21:10             ` Keith Packard
2011-12-23 21:32         ` Keith Packard

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