[Bug 93644] New: System hard lockup when USB-C DP to HDMI adapter unplugged or unplugged/plugged and system suspended skylake cpu

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93644

            Bug ID: 93644
           Summary: System hard lockup when USB-C DP to HDMI adapter
                    unplugged or unplugged/plugged and system suspended
                    skylake cpu
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: sdainard at spd1.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 120914
  --> https://bugs.freedesktop.org/attachment.cgi?id=120914&action=edit
journelctl -k -b 1: Adapter/monitor plugged into laptop

# uname -m
x86_64
# uname -r
4.4.0-0.rc8.git0.1.fc24.x86_64

Distro: Fedora 23
Kernel is from Fedora rawhide (Fedora next)

System: Dell XPS 13 9350

Display connector: USB-C -> HDMI adapter
(http://www.monoprice.com/product?p_id=12905)

System locks up during suspend if an external monitor is connected and then
disconnected via a USB-C -> HDMI adapter.

If the external monitor is NOT disconnected, system does not lock up during
suspend.

If the external monitor is disconnected and reconnected, system WILL lock up.

System does NOT lock up if external monitor is never connected.

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