Bug 95325

Summary: Attaching monitor to Dell XPS crashes
Product: DRI Reporter: Russell Stuart <russell+freedesktop.org>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: CLOSED FIXED QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: normal    
Priority: medium CC: intel-gfx-bugs
Version: unspecified   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: SKL i915 features: display/Other
Attachments:
Description Flags
dmesg with drm.debug=0x1e
none
Xorg.log none

Description Russell Stuart 2016-05-09 07:23:12 UTC 
Created attachment 123560 [details]
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.
Comment 1 Russell Stuart 2016-05-09 07:24:00 UTC 
Created attachment 123561 [details]
Xorg.log
Comment 2 yann 2016-05-09 14:34:47 UTC 
Duplicate of bug 89055 ?
Comment 3 Russell Stuart 2016-05-10 01:55:13 UTC 
Thanks for that pointer.

It is exactly the issue mentioned in https://bugs.freedesktop.org/show_bug.cgi?id=89055#c31 in bug 89055.  But I see https://bugs.freedesktop.org/show_bug.cgi?id=89055#c40 says the issue is fixed in 4.6.  However, the backtrace bug 89055 remains in 4.6, so no, it's not related.

Since it's fixed in 4.6 I'm closing the bug.

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