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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - DP hot plug fails if booted without Monitor Attached"
href="https://bugs.freedesktop.org/show_bug.cgi?id=85924#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - DP hot plug fails if booted without Monitor Attached"
href="https://bugs.freedesktop.org/show_bug.cgi?id=85924">bug 85924</a>
from <span class="vcard"><a class="email" href="mailto:oliver.grafe@ge.com" title="oliver.grafe@ge.com">oliver.grafe@ge.com</a>
</span></b>
<pre>==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</pre>
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