[Bug 90670] New: [SKL desktop]Can not detect VGA

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90670

            Bug ID: 90670
           Summary: [SKL desktop]Can not detect VGA
           Product: DRI
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: yex.tian at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 116065
  --> https://bugs.freedesktop.org/attachment.cgi?id=116065&action=edit
dmesg info

==System Environment==       
-----------------------------------------------------
Regression: Not sure , the first testing
Non-working platforms: SKL desktop

==Kernel==
--------------------------------------------------
commit 5267b96e584de7aa76434cc9fefad61169664c2f
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Tue May 26 19:32:00 2015 +0200

drm-intel-nightly: 2015y-05m-26d-17h-31m-17s UTC integration manifest

==Bug detailed description==
Board is RVP 11.
1, Boot up system with edp, hotplug VGA, VGA cannot be detect
2, Boot up system only with edp, enter kernel successfully.
3, Boot up system only with VGA, in the BIOS post phase VGA are working, VGA
black screen before entering kernel, ssh can successfully.


==Reproduce steps==
----------------------------
1, Only connect the VGA display
2, Boot machine

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