[Bug 89776] New: [BYT]VGA monitor sporadically can't be lighted up

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89776

            Bug ID: 89776
           Summary: [BYT]VGA monitor sporadically can't be lighted up
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: Linux (All)
            Status: NEW
          Severity: minor
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: lei.a.liu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 114640
  --> https://bugs.freedesktop.org/attachment.cgi?id=114640&action=edit
dmesg

==System Environment==
--------------------------
Non-working platforms: Baytrail

==kernel==
--------------------------
-2015Q1 Release 660613d1a4e94144490850b6c3d350331860fac4 (fails)
   Linux 3.19.2
-nightly d851223f114ceee2345bc00e5fa4eee8cc6fe144(works)
   drm-intel-nightly: 2015y-03m-25d-17h-24m-21s UTC integration manifest

I can't reproduce this issue on latest -nighly. 

==Bug detailed description==
-----------------------------
VGA monitor can be recognized, but can't be lighted up. 
If i use "testdisplay -a " , monitor can be lighted up.

==Reproduce steps==
---------------------------- 
1. boot machine up
2. plug in VGA

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