[Bug 84306] New: [BSW]System is unable to goto S3

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84306

          Priority: medium
            Bug ID: 84306
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BSW]System is unable to goto S3
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: lei.a.liu at intel.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 106826
  --> https://bugs.freedesktop.org/attachment.cgi?id=106826&action=edit
dmesg

==System Environment==
--------------------------
Regression: This is first time I test this machine, and I fail to find a good
commit.

Non-working platforms: Braswell

==kernel==
--------------------------
-nightly: 1c38dbc94bc61e685c72994cc9e634d4eb8c4da1 (fails)
    drm-intel-nightly: 2014y-09m-23d-14h-26m-24s UTC integration manifest
-queued: 9adccc6063d1cf6ba38a5a26b87001554105be18 (fails)
    drm/i915: add SW tracking to FBC enabling
-fixes: c84db77010877da6c5da119868ed54c43d59e726 (fails)
    drm/i915/hdmi: fix hdmi audio state readout

==Bug detailed description==
-----------------------------
System is unable to goto S3. System will reboot after I type command line "echo
mem > /sys/power/state".


==Reproduce steps==
---------------------------- 
1. Do S3.

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