[Bug 85641] New: [BSW]DP monitor unable to light up after rotation and hot plug

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85641

            Bug ID: 85641
           Summary: [BSW]DP monitor unable to light up after rotation and
                    hot plug
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: jinxianx.guo at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 108680
  --> https://bugs.freedesktop.org/attachment.cgi?id=108680&action=edit
dmesg

==System Environment==
--------------------------
Regression: No,
The test always fails

Non-working platforms: BSW

==kernel==
--------------------------
origin/drm-intel-nightly: bd21cf795cf5dc278f1451d0f7a597cb1d13c2ba(fails)
    drm-intel-nightly: 2014y-10m-29d-08h-35m-03s UTC integration manifest
origin/drm-intel-next-queued: 421d82916774361a4840018fc3ab3a15751c3ea6(fails)
    drm/i915: use intel_fb_obj() macros to assign gem objects
origin/drm-intel-fixes: b2a9601c587dbc5536546aa54009d1130adedd72(fails)
    drm/i915: Ignore VBT backlight check on Macbook 2, 1

==Bug detailed description==
DP monitor unable to light up after rotation and hot plug. If hot plug without
rotation, this bug unable to reproduce.

==Reproduce steps==
---------------------------- 
1. Boot the device only eDP plugged.
2. Connect DP monitor
3. xinit &
4. xrandr --output DP1 --rotation left
5. Unplugged then plugged DP monitor, the monitor unable to light up

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