[Bug 89668] New: [BSW] HDMI screen becomes black after replug HDMI cable

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89668

            Bug ID: 89668
           Summary: [BSW] HDMI screen becomes black after replug HDMI
                    cable
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: jeff.zheng at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 114455
  --> https://bugs.freedesktop.org/attachment.cgi?id=114455&action=edit
dmesg

==System Environment==
--------------------------
HDMI monitor: ASUS PA238Q
BIOS: V59 
Regression: Yes. drm-intel-testing-2015-01-30 works, but drm-intel-nightly
2015_03_06 fails. Since BSW failed to boot before drm-intel-nightly 2015_03_06,
we are unable to bisect.

Non-working platforms: BSW
Working platforms: 

==kernel==
--------------------------
-testing: drm-intel-testing-2015-03-13 (fails)


==Bug detailed description==
-----------------------------
Boot BSW with HDMI connected without eDP, plug out and in HDMI cable and then
HDMI screen becomes black.

==Reproduce steps==
---------------------------- 
1. Connect HDMI display to BSW and boot BSW
2. Plug out HDMI and then plug in to reconnect HDMI monitor

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