[Bug 107625] external display stops working with error: pipe state doesn't match!

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107625

--- Comment #4 from Evgheni Dereveanchin <jekader at gmail.com> ---
Created attachment 141397
  --> https://bugs.freedesktop.org/attachment.cgi?id=141397&action=edit
dmesg outout around issue

I've not been able to catch the issue for some time and as I was constantly
running out of disk space due to debug logs I decided to undock to see if
that's related.

Attaching dmesg output around the period: the laptop was undocked at 712379 and
docked at 712384. The fifo underrun error appeared immediately after that and
both external displays stopped working. There was no kernel backtrace this
time.

Software versions used are:
kernel 4.17.0-3-amd64 (Debian)
libdrm-intel1-2.4.93-1
xserver-xorg-video-intel 2.99.917+git20171229-1+b1

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