[Bug 90239] New: [SKL desktop] DP hotplug cause " CPU pipe A FIFO underrun" ERROR

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90239

            Bug ID: 90239
           Summary: [SKL desktop] DP hotplug cause " CPU pipe A FIFO
                    underrun" ERROR
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: Linux (All)
            Status: NEW
          Severity: major
          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 115449
  --> https://bugs.freedesktop.org/attachment.cgi?id=115449&action=edit
dmesg

==System Environment==
--------------------------
Regression: No. This is first time test on this machine.
Non-working platforms: SKL

==kernel==
--------------------------
-nightly: 9a4da5ec419897b78c1d4a3949c0c049db5402c5 (fails)
    drm-intel-nightly: 2015y-04m-28d-14h-41m-15s UTC integration manifest
-queued: de4de566f84b87f4d5f8265b11932088adb19896 (fails)
    drm/i915: Update DRIVER_DATE to 20150423
-fixes: a04f90a33fab74789b91fc9739999012f11022d1 (fails)
    drm/i915/chv: Implement WaDisableShadowRegForCpd
==Bug detailed description==
-----------------------------
Unplug DP monitor system output ERROR:
[drm:gen8_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun

==Reproduce steps==
---------------------------- 
1. unplug DP
2. check screen.

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