[Bug 81537] [snb dp regression] dp retry forever due to setting sink dpms to OFF

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81537

--- Comment #20 from Alberto Garcia <berto at igalia.com> ---
Created attachment 110085
  --> https://bugs.freedesktop.org/attachment.cgi?id=110085&action=edit
Kernel messages

Hello, I have a similar problem as the one described here.

I have a ThinkPad x230 with the following graphics card:

00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor
Graphics Controller [8086:0166] (rev 09)

The monitor is an ASUS PA248Q, connected to the computer using a
MiniDisplayPort to DisplayPort cable.

I've also been experiencing freezes, and the kernel regularly prints
stack traces like the ones you can see in the attached log.

This happens when I turn the monitor off (using the power button)
while the cable is connected.

I generated the log using the patch from comment #19. The kernel is from
Debian:

Linux 3.16.0-4-amd64 #1 SMP Debian 3.16.7-2 (2014-11-06) x86_64 GNU/Linux

Reverting the patch mentioned by Adam also makes my system more stable.

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