[Bug 95325] New: Attaching monitor to Dell XPS crashes

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95325

            Bug ID: 95325
           Summary: Attaching monitor to Dell XPS crashes
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: russell+freedesktop.org at stuart.id.au
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 123560
  --> https://bugs.freedesktop.org/attachment.cgi?id=123560&action=edit
dmesg with drm.debug=0x1e

Hardware:

  Dell XPS 15 9510
 
http://www.dell.com/support/home/au/en/aubsd1/product-support/servicetag/F1BFJ72/configuration?s=DHS

  AOC U3477PQU Monitor
  http://aoc-europe.com/en/products/u3477pqu

Software: Debian Jessie (Testing), + linux-image-4.5.0-2-amd64_4.5.2-1

Problem
=======

All sorts of horrible behaviour when a AOC U3477PQU is plugged into the
laptop's HDMI port ranging from both Laptop LCD and Monitor flickering for a
while (sometimes seconds, but once literally 8 hours) before working to machine
hangs (as in keyboard caps lock indicator doesn't change when you press the
caps lock key) before X attempts to start.

There are lots of backtraces in the attached dmesg which seem related.

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