Bug 112073 - Filing "GPU HANG" Bug (as requested by dmesg)
Summary: Filing "GPU HANG" Bug (as requested by dmesg)
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: unspecified
Hardware: Other All
: lowest not set
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
Whiteboard: Triaged
Depends on:
Reported: 2019-10-20 17:35 UTC by mailhol.vincent
Modified: 2019-11-29 19:42 UTC (History)
1 user (show)

See Also:
i915 platform: CFL
i915 features: GPU hang

results of 'cat /sys/class/drm/card0/error > error', 'dmesg > dmesg' and 'uname -a' > uname (50.48 KB, application/x-xz)
2019-10-20 17:35 UTC, mailhol.vincent
no flags Details

Description mailhol.vincent 2019-10-20 17:35:59 UTC
Created attachment 145779 [details]
results of 'cat /sys/class/drm/card0/error > error', 'dmesg > dmesg' and 'uname -a' > uname

I saw below text in dmesg, so as requested, I am filing a bug report.

>> GPU HANG: ecode 9:2:0xfffffffe, in systemd-logind [301], hang on bcs0
>> GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace. Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel drm/i915 developers can then reassign to the right component if it's not a kernel issue. The gpu crash dump is required to analyze gpu hangs, so please always attach it. GPU crash dump saved to /sys/class/drm/card0/error

I saw no symptoms aside of the dmesg report. On the user side everything seems OK.
So far, this is a single occurrence.

As you can see in dmesg log, please also note that the kernel was "tainted" because I loaded a network module (no public release of that module available).
Comment 1 Chris Wilson 2019-10-20 18:18:43 UTC
Huh, an unterminated batch buffer. GPU overran into the wrong batch and exploded.
Comment 2 Martin Peres 2019-11-29 19:42:28 UTC
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