[Bug 89872] New: [ HSW Regression ] VGA was white screen when resume in test S3 with 3pipe

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89872

            Bug ID: 89872
           Summary: [ HSW Regression ] VGA was white screen when resume in
                    test S3 with 3pipe
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: bin.a.xu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 114827
  --> https://bugs.freedesktop.org/attachment.cgi?id=114827&action=edit
dmesg

==System Environment==
--------------------------
Regression: Yes. Good commit: 4fa23142a15526f4a4b5df61f26eacdd558a849a.

Non-working platforms: Haswell

==kernel==
--------------------------
-nightly: 60c5b7f582e8ced10dcd557db4ea66665e6a4dff (fails)
   drm-intel-nightly: 2015y-03m-26d-21h-48m-18s UTC integration manifest
-queued: d21bd67bbbc635424b336b7c881dbcdf6098f9f5(fails)
    drm/i915: Don't use encoder->new_crtc in intel_lvds_compute_config()
-fixes: 5f407751b0ca9bd876fe8f15ff28153661c6ba0a (fails)
    drm/i915: Fixup legacy plane->crtc link for initial fb config

==Bug detailed description==
-----------------------------
Test S3 with 3 pipe,all monitor can resume successfully,but the VGA was white
screen.

==Reproduce steps==
---------------------------- 
1.xinit &
2.echo mem > /sys/power/state
3.Knock on the keyboard
VGA was white screen when resume in test S3 with 3pipe,2 DP was normal.

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