[Bug 82842] New: [BYT-M]System unable go to S4 sporadically

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Tue Aug 19 23:12:29 PDT 2014


https://bugs.freedesktop.org/show_bug.cgi?id=82842

          Priority: medium
            Bug ID: 82842
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BYT-M]System unable go to S4 sporadically
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: jinxianx.guo at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

==System Environment==
--------------------------
Regression: Not sure.
Result on -next-queued(5193109cd669c7990b043a7187548546c16f8af3) was "System
unable resume from S3/S4 "(Bug 81948)

Non-working platforms: BYT-M

==kernel==
--------------------------
origin/drm-intel-nightly: 49ceddc7b3b0e3f7eb21b9fb4c9b840cff630047(fails)
    drm-intel-nightly: 2014y-08m-19d-19h-02m-49s integration manifest
origin/drm-intel-next-queued: 3f72c7b12f1a81a32fd37216b3382e6fe46a7184(fails)
    drm/i915/bdw: Disable execlists by default
origin/drm-intel-fixes: 1a125d8a2c22b11741fc47d4ffcf7a5ffa044dd3(fails)
    drm/i915: don't try to retrain a DP link on an inactive CRTC

==Bug detailed description==
-----------------------------
Input 'echo disk >/sys/power/state' and press enter, the screen will light off,
but the power light still light on, and the cpu fan still working.

The reproduce rate about 1 out of 10.

System unable resume from S3/S4 before(Bug 81948)

Because of system had no responding, unable to get dmesg. 

==Reproduce steps==
---------------------------- 
1. echo disk >/sys/power/state

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