[Bug 71267] sna: (Haswell) X-server freezes when enabling DP at docking station

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=71267

--- Comment #156 from Mark A. Hershberger <mah at everybody.org> ---
Additional datapoint since I just ran into this bug but haven't yet managed to
upgrade the firmware.

I am running Debian Testing right now on a new x240 with the ultradock.  I was
testing this and, just as gdm was about to start up, I docked the system.

Kernel is now saying "task kworker/1:3:1450 blocked for more than 120 seconds"
and "task Xorg:1647 blocked for more than 120 seconds" followed by "Not tainted
3.12-1-amd64 #1"

I'll apply the firmware updates, but it I thought this might help someone who
was searching for an answer.

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