[Bug 107546] Screen is frozen on second connection of DP MST dock

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107546

--- Comment #3 from Sergey Menshikov <sergey.menshikov at gmail.com> ---
Jani, do I have to build anything beyond kernel and modules?

I built kernel and modules and installed them, but the experience is not
exactly the same. (I am following this recipe
https://01.org/linuxgraphics/documentation/build-guide-0)

Re: GuC firmware loading as a workaround: my theory is that it is a race
condition with modesetting happening during the time displays disconnect (taken
from here https://patchwork.kernel.org/patch/8603521/). Anything can tip off
race a condition, so I tried a number of i915 options, including firmware
loading, it seems to be helping (hard to prove negative).

One additional piece of data I failed to mention: my set up is to turn off
laptop display when connecting two external monitors, and turn it back on when
I disconnect them.


Stanislav, laptop screen literally freezes - the image is still there, mouse
moves, nothing happens on click or keyboard input. Two external monitors stay
black.

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