[Bug 95521] DP unplug and undocking ThinkPad produces dmesg errors

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95521

--- Comment #15 from Pierre-Yves David <pierre-yves.david at ens-lyon.org> ---
I've been having similar issue for multiple months, I've using a Think pad X260
with a dock and 2 monitor plugged to the dock through display port. The monitor
fails to fails to wake up when get back to the laptop (and other strange
behavior like X freezing for a couple of minute when I managed to get them
detected again. I've seen many of the dmesg shown in this thread. Today I got:

  [Sat Jan 21 14:47:49 2017] [drm:intel_encoders_disable.isra.107 [i915]]
*ERROR* failed to update payload -22
  [Sat Jan 21 14:47:49 2017] [drm:intel_encoders_disable.isra.107 [i915]]
*ERROR* failed to update payload -22
  [Sat Jan 21 16:02:01 2017] [drm:intel_pipe_update_end [i915]] *ERROR* Atomic
update failure on pipe A (start=292 end=293) time 127 us, min 763, max 767,
scanline start 761, end 769
  [Sat Jan 21 16:15:46 2017] [drm:intel_pipe_update_end [i915]] *ERROR* Atomic
update failure on pipe A (start=49791 end=49792) time 125 us, min 763, max 767,
scanline start 761, end 769

I'm using debian unstable: kernel is" Linux 4.9.0-1-amd64 #1 SMP Debian 4.9.2-2
(2017-01-12) x86_64 GNU/Linux.
How can I help you debug the problem further?

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