[Bug 63912] New: [ILK] Kill X cause call trace with DP pipe

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=63912

          Priority: medium
            Bug ID: 63912
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [ILK] Kill X cause call trace with DP pipe
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: All
          Reporter: yangweix.shui at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 78453
  --> https://bugs.freedesktop.org/attachment.cgi?id=78453&action=edit
dmesg : kill X cause call trace with DP pipe

Description:
------------------------
When killed X with other pipe like: VGA,eDP, there's not "Call Trace" in dmesg,
but when I plugged in DP, then xinit & and pkill X, system will cause a "Call
Trace". I have checked many kernels till to re-3.8, all have this issue. It
doesn't cause other problem, might because of this, we haven't checked the
dmesg when killed X. Currently I can't find a good commit, and I append the
dmesg of re-3.8 kernel test results. If anything needed, I'm glad to working
for this.

reproduce step:
------------------------
1. plugged in DP pipe
2. xinit &
3. pkill X
4. dmesg | grep -i "call trace"

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