Bug 78056

Summary: [HSW] resume from s4 sporadically causes system hang,with warm boot
Product: DRI Reporter: liulei <lei.a.liu>
Component: DRM/IntelAssignee: Ben Widawsky <ben>
Status: CLOSED DUPLICATE QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: critical    
Priority: medium CC: intel-gfx-bugs, przanoni
Version: unspecified   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:

Description liulei 2014-04-29 03:30:44 UTC 
Environment:
-------------------
Kernel: (drm-intel-next-queued)b7c0d9df97c10ec5693a838df2fd53058f8e9e96
Some additional commit info:
Author:     Daniel Vetter <daniel.vetter@ffwll.ch>
AuthorDate: Fri Apr 25 16:59:00 2014 +0200
Commit:     Daniel Vetter <daniel.vetter@ffwll.ch>
CommitDate: Fri Apr 25 16:59:00 2014 +0200

    drm/i915: Integrate cmd parser kerneldoc

    Ville noticed that we have this nice kerneldoc but it's not integrated
    anywhere. Fix this asap!

    Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
    Cc: Brad Volkin <bradley.d.volkin@intel.com>
    Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>


Description:
--------------------
run S4 test in a loop. system resume with hang. This issue is probabilistic, perhaps it will come up to your eyes for just a while S4 test or more. I remove i915 module,then I run 20 times. It works well.

Reproduce step:
----------------------
1.boot up machine with command "reboot"(warm boot)
2.echo 0 > /sys/class/rtc/rtc0/wakealarm ; 
  echo +10 > /sys/class/rtc/rtc0/wakealarm; 
3.echo disk > /sys/power/state
4.loop running step 2 and 3
Comment 1 Paulo Zanoni 2014-04-29 13:11:03 UTC 

*** This bug has been marked as a duplicate of bug 65496 ***

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