Re: [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung justinmattock at
Tue Oct 23 11:15:32 PDT 2012

Sure.. seems this error is happening frequently to gather the debug info(will send out as soon as it hits). As for the bisect it is doable when I get the time. Just need a reliable recreation of the error so the bisect is correct.

Justin P. Mattock

----- Reply message -----
From: "Daniel Vetter" <daniel at>
To: "Justin P. Mattock" <justinmattock at>
Cc: <dri-devel at>, <linux-kernel at>
Subject: [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung
Date: Tue, Oct 23, 2012 10:40 am

On Tue, Oct 23, 2012 at 10:06:52AM -0700, Justin P. Mattock wrote:
> This is happening both with MAINLINE and NEXT.
> basically system is running fine, then under load system becomes
> really sluggish and unresponsive. I was able to get dmesg of the
> error..:
> [ 7745.007008] ath9k 0000:05:00.0 wlan0: disabling VHT as WMM/QoS is
> not supported by the AP
> [ 7745.007736] wlan0: associate with 68:7f:74:b8:05:82 (try 1/3)
> [ 7745.011456] wlan0: RX AssocResp from 68:7f:74:b8:05:82
> (capab=0x411 status=0 aid=5)
> [ 7745.011529] wlan0: associated
> [ 8120.812482] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer
> elapsed... GPU hung
> [ 8120.812642] [drm] capturing error event; look for more
> information in /debug/dri/0/i915_error_state
> [ 8122.328682] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer
> elapsed... GPU hung
> [ 8122.328845] [drm:i915_reset] *ERROR* GPU hanging too fast,
> declaring wedged!
> [ 8122.328850] [drm:i915_reset] *ERROR* Failed to reset chip.
> full log is here:
> as for good kernels from what I remember 3.6.0-rc1. I can try a
> bisect on this once I get the time. or if anybody has a patch I can
> test.

Can you please rehand your machine, and then grab the i915_error_state
from debugfs? That contains the gpu hang dump we need to diagnose things.

And the bisect would obviously be awesome.

Thanks, Daniel
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 -
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