Bug 112073

Summary: Filing "GPU HANG" Bug (as requested by dmesg)
Product: DRI Reporter: mailhol.vincent
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: RESOLVED MOVED QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: not set    
Priority: lowest CC: intel-gfx-bugs
Version: unspecified   
Hardware: Other   
OS: All   
Whiteboard: Triaged
i915 platform: CFL i915 features: GPU hang
Description Flags
results of 'cat /sys/class/drm/card0/error > error', 'dmesg > dmesg' and 'uname -a' > uname none

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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