Bug 90835

Summary: [4.1-rc6] gpu hang: ecode 6:-1:0x00000000, Kicking stuck semaphore on render ring
Product: DRI Reporter: Martin Steigerwald <Martin>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: CLOSED DUPLICATE QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: normal    
Priority: medium CC: intel-gfx-bugs
Version: unspecified   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
4.1-rc6 none

Description Martin Steigerwald 2015-06-03 21:44:24 UTC 
Created attachment 116272 [details]
4.1-rc6

With 4.1-rc6 I got this after playing PlaneShift for a while:

[ 7168.882024] [drm] GPU HANG: ecode 6:-1:0x00000000, reason: Kicking stuck semaphore on render ring, action: continue
[ 7168.882051] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
[ 7168.882052] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
[ 7168.882054] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
[ 7168.882055] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
[ 7168.882057] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[ 7201.882566] mce: [Hardware Error]: Machine check events logged
[ 7204.891713] [drm] GPU HANG: ecode 6:-1:0x00000000, reason: Kicking stuck semaphore on render ring, action: continue
[ 7676.967832] [drm] GPU HANG: ecode 6:-1:0x00000000, reason: Kicking stuck semaphore on render ring, action: continue
[ 7708.969124] [drm] GPU HANG: ecode 6:-1:0x00000000, reason: Kicking stuck semaphore on render ring, action: continue
[ 7919.003315] [drm] GPU HANG: ecode 6:-1:0x00000000, reason: Kicking stuck semaphore on render ring, action: continue
[ 8111.034712] [drm] GPU HANG: ecode 6:-1:0x00000000, reason: Kicking stuck semaphore on render ring, action: continue
[ 8193.048111] [drm] GPU HANG: ecode 6:-1:0x00000000, reason: Kicking stuck semaphore on render ring, action: continue
[ 8329.070245] [drm] GPU HANG: ecode 6:-1:0x00000000, reason: Kicking stuck semaphore on render ring, action: continue


The machine, a ThinkPad T520, was overheating during playing PlaneShift, but the hangs happened afterwards.

I will attach the dump file.

GPU hangs now happen from time to time after I stopped playing PlaneShift.

I thought I never saw this before, but I can see it in logs back to 24th of May.

So, I think 4.1-rc4 which I installed at 19th of May is also affected.

Bug #89524 GPU HANG: ecode 6:-1:0x00000000, reason: Kicking stuck wait on render ring, action: continue

may be related, but I think I didn´t see it before kernel 4.1, so this may have a different cause. Feel free to merge bug reports if you think its the same issue.
Comment 1 Martin Steigerwald 2015-06-03 21:46:36 UTC 
As for the overheating issue, that is I think partly aged cooling system and partly inability to throttle CPU usage while GPU intense application is running:

[Bug 97261] New: Intel P-State driver does not honor no_turbo  
https://bugzilla.kernel.org/show_bug.cgi?id=97261
Comment 2 Chris Wilson 2015-06-04 05:46:09 UTC 

*** This bug has been marked as a duplicate of bug 54226 ***
Comment 3 Martin Steigerwald 2015-06-04 09:10:24 UTC 
Chris, its really that for me 4.1-rc6 makes things much *worse*. I am typing this after a clean reboot and already got the GPU hang again. It happens about every few minutes. Are you really sure this is the same GPU hang as in bug 54226? I didn´t have this before 4.1 kernel?

Also I note that I still use

        Option          "AccelMethod"   "uxa"

and I have

martin@merkaba:~> cat /etc/modprobe.d/i915-kms.conf 
options i915 modeset=1 i915_enable_rc6=7

thus maximum energy saving. But according to powertop it never enters the highed sleep state anyway.

I will remove the AccelMethod setting now and see whether it helps. If not, I downgrade to 4.1-rc4 for now, as issues have been at least much less frequent with it.

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