[Bug 92308] Lenovo X1 OneLink Pro Dock + Lenovo 4k monitor fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92308

--- Comment #4 from Benjamin Herrenschmidt <benh at kernel.crashing.org> ---
I tried again --mode/--rate to set --output DP2-2 to 30Hz but that locked up
immediately this time. Still nothing in the error file. I will try ssh'ing next
time in case the machine is still responsive but that will have to wait
possibly til tomorrow.

Let me know if there's anything else I can do such as capturing registers
etc...

Note that it works in Windows, however the dock output in that case is limited
to 30Hz (I believe the OneLink docks are DP1.1 only).

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