[Bug 72917] New: [HSW] kms_flip hangs the machine

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=72917

          Priority: medium
            Bug ID: 72917
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [HSW] kms_flip hangs the machine
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: przanoni at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

On my HSW ULT machine, with just an eDP monitor attached, if I run kms_flip, it
never finishes: stays stuck forever.

Also, I could identify that at least the flip-vs-modeset-vs-hang,
flip-vs-panning-vs-hang and flip-vs-dpms-off-vs-modeset tests fail and cause
lots of errors on dmesg.

I don't know if this is a recent regression: spotted the problem today on
-nightly.

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