[Bug 111250] i915 external monitor not working in usb-c/thunderbolt dock on X1 gen6

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111250

--- Comment #11 from Stanislav Lisovskiy <stanislav.lisovskiy at intel.com> ---
(In reply to tmai from comment #10)
> Created attachment 145279 [details]
> dmesg dump after booting to console
> 
> I added the parameter 3 to boot to console which resulted in the attached
> dmesg_dump (I re-used the last drm-tip kernel I compiled).
> 
> After attaching the monitor to the docking station I got a couple of FIFO
> underrun messages directly on the console. I took a photo, however, they are
> also reported in the dmesg dump.

Did the external display show anything in console mode or the system freeze?
FIFO underruns are irrelevant to the problem and can happen for short time
during modeset.

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