Bug 71725

Summary: [IVB Regression]boot system has <3>[ 0.753474] [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting for forcewake old ack to clear.
Product: DRI Reporter: lu hua <huax.lu>
Component: DRM/IntelAssignee: Daniel Vetter <daniel>
Status: CLOSED FIXED QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: major    
Priority: high CC: intel-gfx-bugs
Version: unspecified   
Hardware: All   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
dmesg none

Description lu hua 2013-11-18 07:42:35 UTC 
Created attachment 89386 [details]
dmesg

System Environment:
--------------------------
Platform:  Ivybridge
Kernel: (drm-intel-fixes)29c78f609e661e663a239a37923adb1d61f6386c

Bug detailed description:
-----------------------------
Boot system, <3>[    0.753474] [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting for forcewake old ack to clear. appears in mdesg.
It happens on ivybridge with -nightly and -fixes kernel. It doesn't happen on -queued kernel.

The latest known good commit:1fbc0d789d12fec313c91912fc11733fdfbab863
The latest known bad commit:29c78f609e661e663a239a37923adb1d61f6386c

Reproduce steps:
----------------------------
1. clear boot system
2. dmesg -r | egrep "<[1-3]>" |grep drm
Comment 1 Daniel Vetter 2013-11-18 08:08:12 UTC 
Good chance this is fixed with

commit ef46e0d247da0a7a408573aa15870e231bbd4af2
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Sat Nov 16 16:00:09 2013 +0100

    drm/i915: restore the early forcewake cleanup
Comment 2 lu hua 2013-11-20 07:11:50 UTC 
Verified.Fixed.
Comment 3 Gordon Jin 2014-01-03 01:51:14 UTC 
(give the credit to Daniel)
Comment 4 Elizabeth 2017-10-06 14:42:03 UTC 
Closing old verified.

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