[Bug 89005] New: [BSW Regression] System will hang after suspend/resume for several times.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89005

            Bug ID: 89005
           Summary: [BSW Regression] System will hang after suspend/resume
                    for several times.
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: jeff.zheng at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

==System Environment==
--------------------------
BIOS: V55 with 'dynamic memory self refresh' disabled

Regression: Yes. It works on drm-intel-testing-2014-12-05.

Non-working platforms: BSW

==kernel==
--------------------------
-testing: 2015_01_30 commit 4d3645e40c7039f60b6db0ce9c2251ac34faef81 (fails)

==Bug detailed description==
-----------------------------
I tried suspend/resume with S3 for several and found system hangs.
Saw the same issue when suspend/resume with S4.
Will try to capture dmesg and bisect next work day.

==Reproduce steps==
---------------------------- 
1. Boot and login
2. echo mem > /sys/power/state
3. Click keyboard key to resume
4. Repeat step 2,3 for several times, system hangs.

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