Bug 88520

Summary: [HSW] Hard lockup + reboot 3.17
Product: DRI Reporter: Lionel Landwerlin <lionel.g.landwerlin>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: CLOSED FIXED QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: normal    
Priority: medium CC: intel-gfx-bugs
Version: XOrg git   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: HSW i915 features: power/Other
Attachments:
Description Flags
/var/log/messages.gz none

Description Lionel Landwerlin 2015-01-17 00:34:58 UTC 
Just had a hard lockup on my haswell (Macbook Air 2013).
Probably really hard to reproduce, but I thought I would report it anyway.

Attached is the dmesg, it spans across 24 hours, including around 23 hours of suspend, you can see a lot backtraces before the suspend and so much after the wakeup that it's probably what triggered the lockup.
It looks like pretty much all write to registers trigger a backtrace.

I thought it would be interesting for the record, even if nobody can reproduce.

Userspace stack :

libdrm-intel1: 2.4.58
xserver-xorg-video-intel: 2.21.15
libva: 1.4.1
intel-libva-driver: 1.4.1
Comment 1 Lionel Landwerlin 2015-01-17 00:36:55 UTC 
Created attachment 112371 [details]
/var/log/messages.gz
Comment 2 Jani Nikula 2015-10-23 10:37:01 UTC 
I'm guessing this is the hsw pm refcounting issue, closing. Please reopen if the problem reappears with latest kernels.

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