Re: frequent x crashes with gen6/sna

From: "Nicolas Kalkhof" <nkalkhof@web.de>
To: intel-gfx@lists.freedesktop.org
Subject: Re: frequent x crashes with gen6/sna
Date: Thu, 13 Oct 2011 18:36:05 +0200 (CEST)	[thread overview]
Message-ID: <922413742.136115.1318523765885.JavaMail.fmail@mwmweb002> (raw)

Hi Daniel,

any advice what else to grab besides /sys/kernel/debug/dri/0/i915_error_state and dmesg?
after the crash resulting in the forcewake warning (X was gone and I had a completely black screen, had to ssh from a remote machine) the i915_error_state was empty (i.e. no error state collected). Still waiting for the next hang ;). I'll post more debug info asap.

Thx and regards,
Dieter

-----Ursprüngliche Nachricht-----
Von: "Daniel Vetter" <daniel@ffwll.ch>
Gesendet: Oct 13, 2011 6:24:34 PM
An: "Dieter Mummenschanz" <mummenschanz@gmx.net>
Betreff: Re: [Intel-gfx] frequent x crashes with gen6/sna

>The attached log shouldn't result in a dead X server - it's the rather
>harmless forcewake warning when reading certain debugfs files. Please
>grab the next hang.
>
>Thanks, Daniel
>
>On Thu, Oct 13, 2011 at 16:55, Dieter Mummenschanz <mummenschanz@gmx.net> wrote:
>> hi daniel,
>>
>> roger that. the last x death however was not preceeded by a gpu hang (see message log, dmesg.log also attached). Maybe I ran into something different than experienced before.No i915_error_state was logged. I remember I ran into something similar a couple of days ago and someone provided a patch that seemed to work. however I have no idea if the patch has been included in the latest Dave's latest drm-next git.
>>
>> Oct 13 16:40:22 gonzo kernel: WARNING: at drivers/gpu/drm/i915/i915_drv.c:354 gen6_gt_force_wake_get+0x1f/0x3c [i915]()
>> Oct 13 16:40:22 gonzo kernel: Hardware name: 4236NGG
>> Oct 13 16:40:22 gonzo kernel: Modules linked in: i915 fbcon font bitblit softcursor drm_kms_helper drm fb fbdev snd_hda_codec_conexant thinkpad_acpi nvram e1000e iwlagn intel_agp cfbcopyarea intel_gtt video snd_hda_intel backlight agpgart snd_hda_codec cfbimgblt cfbfillrect
>> Oct 13 16:40:22 gonzo kernel: Pid: 5164, comm: cat Not tainted 3.1.0-rc4+ #1
>> Oct 13 16:40:22 gonzo kernel: Call Trace:
>> Oct 13 16:40:22 gonzo kernel: [<ffffffff8102fcf2>] ? warn_slowpath_common+0x78/0x8c
>> Oct 13 16:40:22 gonzo kernel: [<ffffffffa00ff484>] ? gen6_gt_force_wake_get+0x1f/0x3c [i915]
>> Oct 13 16:40:22 gonzo kernel: [<ffffffffa0108d0e>] ? i915_rstdby_delays+0x2e/0x77 [i915]
>> Oct 13 16:40:22 gonzo kernel: [<ffffffff810ba9d1>] ? seq_read+0x16e/0x355
>> Oct 13 16:40:22 gonzo kernel: [<ffffffff810a1eaa>] ? vfs_read+0xac/0x126
>> Oct 13 16:40:22 gonzo kernel: [<ffffffff810a1f69>] ? sys_read+0x45/0x6e
>> Oct 13 16:40:22 gonzo kernel: [<ffffffff813b3c7b>] ? system_call_fastpath+0x16/0x1b
>> Oct 13 16:40:22 gonzo kernel: ---[ end trace 056b0c70c095c365 ]---
>>
>> Regards,
>> Dieter
>>
>> -------- Original-Nachricht --------
>>> Datum: Thu, 13 Oct 2011 16:00:23 +0200
>>> Von: Daniel Vetter <daniel@ffwll.ch>
>>> An: Dieter Mummenschanz <mummenschanz@gmx.net>
>>> CC: intel-gfx@lists.freedesktop.org
>>> Betreff: Re: [Intel-gfx]  frequent x crashes with gen6/sna
>>
>>> On Thu, Oct 13, 2011 at 03:45:22PM +0200, Dieter Mummenschanz wrote:
>>> > hello,
>>> >
>>> > using latest drm-core-next git from Dave Airlie as well as the latest
>>> xf86-video-intel git my system (Sandybridge Mobile (GT2+)) still hangs
>>> frequently right before X dies. This happens every time the GPU is under
>>> considerable stress, like decoding a va-api stream and running OpenGL apps at the
>>> same time.
>>> > syslog records the hang:
>>> >
>>> > kernel: [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed...
>>> GPU hung
>>> > kernel: [drm] capturing error event; look for more information in
>>> /debug/dri/0/i915_error_state
>>> > kernel: [drm:i915_wait_request] *ERROR* i915_wait_request returns -11
>>> (awaiting 3263296 at 3263293, next 3263297)
>>> >
>>> > after 3-4 seconds the system resumes normal following the X crash a
>>> couple of minutes later:
>>> > kernel: [drm:ironlake_update_pch_refclk] *ERROR* enabling SSC on PCH
>>> > kernel: [drm:ironlake_update_pch_refclk] *ERROR* enabling SSC on PCH
>>> >
>>> > gpu related module opts are:
>>> > i915.i915_enable_rc6=1 pcie_aspm=force i915.i915_enable_fbc=1
>>> i915.lvds_downclock=1
>>> >
>>> > at least rc6 enabled is mandatory for me since I ran a mobile gpu.
>>> >
>>> > any ideas?
>>>
>>> We have (unfortunately) still a few outstanding issues. To check whether
>>> yours is new, please attach the full dmesg and the i915_error_state of the
>>> gpu hang.
>>>
>>> Thanks, Daniel
>>> --
>>> Daniel Vetter
>>> Mail: daniel@ffwll.ch
>>> Mobile: +41 (0)79 365 57 48
>>
>> --
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>>
>
>
>
>--
>Daniel Vetter
>daniel.vetter@ffwll.ch - +41 (0) 79 364 57 48 - http://blog.ffwll.ch
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