[Bug 85924] DP hot plug fails if booted without Monitor Attached

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85924

--- Comment #1 from oliver.grafe at ge.com ---
==System Environment==
--------------------------

Supermicro X10SAE (C226 Lynxpoint) 
Intel(R) Xeon(R) CPU E3-1268L

old hp1530 Monitor attached via Display-Port->DVI Adapter Cable

Distribution:
OpenSuse 13.2 RC2


==kernel==
--------------------------
Latest OpenSuse "Kernel of the day":

linux-bc55:/etc # uname -sovr
Linux 3.18.0-rc3-3.ge706e91-default #1 SMP Tue Nov 4 12:43:57 UTC 2014
(e706e91) GNU/Linux


==Bug detailed description==
When the system is booted with the monitor attached, hot-plugging works fine:
Pull the DP adapter, plug back in -> monitor image restored.

This does not work when the system is cold-booted without any DP cable
attached:
Boot system without monitor, plug DP cable in -> no monitor image.

dmesg with drm.debug=6 attached, hot-insert at timecode 163.


==Reproduce steps==
---------------------------- 
1. Boot up the system without a monitor attached
2. Hot-Plug Display Port Cable
3. Monitor shows no image

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20141105/5ecf6c09/attachment.html>