Kernel Bug Tracker – Bug 38122
3.0-rc3 WARNING: at drivers/gpu/drm/i915/i915_drv.c:340 gen6_gt_force_wake_put+0x29/0x52 [i915]()
Last modified: 2011-06-27 19:17:52 UTC
Subject : 3.0-rc3 WARNING: at drivers/gpu/drm/i915/i915_drv.c:340 gen6_gt_force_wake_put+0x29/0x52 [i915]()
Submitter : "Kan-Ru Chen" <firstname.lastname@example.org>
Date : 2011-06-14 12:12
Message-ID : email@example.com
References : http://marc.info/?l=linux-kernel&m=130805412314680&w=2
This entry is being used for tracking a regression from 2.6.39. Please don't
close it until the problem is fixed in the mainline.
Subject : WARNING: at drivers/gpu/drm/i915/i915_drv.c:344 gen6_gt_force_wake_put+0x58/0x60()
Submitter : Jens Axboe <firstname.lastname@example.org>
Date : 30.05.2011 20:32
Message-ID : <4DE3E2C9.email@example.com>
References : https://lkml.org/lkml/2011/5/30/261
As well as:
Bug 712593 - [abrt] kernel: WARNING: at drivers/gpu/drm/i915/i915_drv.c:322 gen6_gt_force_wake_get+0xe4/0xf0(): TAINTED Warning Issued
I can confirm this on my new ThinkPad T520 with Intel SandyBridge GPU:
martin@merkaba:~> cat /proc/version
Linux version 3.0.0-rc4-amd64 (Debian 3.0.0~rc4-1~experimental.1) (firstname.lastname@example.org) (gcc version 4.4.6 (Debian 4.4.6-6) ) #1 SMP Tue Jun 21 13:22:03 UTC 2011
martin@merkaba:~> lspci -nn | grep VGA
00:02.0 VGA compatible controller : Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0126] (rev 09)
Has been in 3.0.0-rc3 and according to Jens in 3.0.0-rc1 already.
Did certainly not happen in 2.6.39-2-amd64. I am using Debian GNU/Linux kernels at the moment, but that should not matter.
It happens on every suspend-to-disk or resume-from-disk - a lot of them. It did not see it on regular boot or on suspend-to-ram.
I have seen no other effect, so this might just be some quite verbose debugging message?
Created attachment 63432 [details]
cropped syslog that with a suspend cycle including those messages
It seems on resume the messages come before the resume kernel switches to the hibernated kernel and are thus not in the logs.
Hmmm, I am not so sure about my assumption on whether those messages are from suspend to resume. See for yourself. Thanks.
Date : 2011-06-14 12:12
This should be fixed in 483f1798998ede75b2575cc1813c3d89ba64a34e which has been merged to master.
On Monday, June 27, 2011, Jens Axboe wrote:
> On 2011-06-26 23:23, Rafael J. Wysocki wrote:
> > This message has been generated automatically as a part of a summary report
> > of recent regressions.
> > The following bug entry is on the current list of known regressions
> > from 2.6.39. Please verify if it still should be listed and let the tracking team
> > know (either way).
> > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=38122
> > Subject : 3.0-rc3 WARNING: at drivers/gpu/drm/i915/i915_drv.c:340 gen6_gt_force_wake_put+0x29/0x52 [i915]()
> > Submitter : Jens Axboe <email@example.com>
> > Date : 2011-06-14 12:12 (13 days old)
> By the looks of it, commit 483f1798 should fix it.