[Bug 83483] New: [BSW]System unable go to S3/S4

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83483

          Priority: high
            Bug ID: 83483
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BSW]System unable go to S3/S4
        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: No.
This bug always exist

Non-working platforms: BSW

==kernel==
--------------------------
origin/drm-intel-nightly: 4144c90b76dfe6eaa2205ac947090786b5091cff(fails)
    drm-intel-nightly: 2014y-09m-03d-15h-44m-26s integration manifest
origin/drm-intel-next-queued: 8fe8a3feeb5aedd17f7b09e51b60b38a6ba7005f(fails)
    drm/i915: init sprites with univeral plane init function
origin/drm-intel-fixes: 77520c8fccc1a599ff7a7b786dacdfdad38b96e4(fails)
    drm/i915: Prevent recursive deadlock on releasing a busy userptr

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

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

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

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