Of course I continued trying.
Having also xorg crashes, I googled also for that one. And found hints to update the kernel - but this did not change anything: "you have already the most recent..."
However, before doing it I thought it might be safe to uninstall the displaylink drive again - and then I re-installed it of course. Expecting that nothing can be done at the moment but switching where the monitors are plugged into the thunderbolt dock: so far I had from left to right first one monitor working, then one black, and then the notebook builtin screen, and I wanted to have the working monitor next to the notebook.
But after switching - what a surprise: now both monitors are recognized again!
So one more hint that MIGHT have had an effect: both monitors have a "good old" DVI connection cable, while the dock has for both possible monitors both a HDMI and a Displayport connector. For one of the monitors I already had an old Displayport adapter, and for the other one I bought a HDMI connector.
Before they were plugged in as follows:
monitor 1: Displayport
monitor 2: HDMI
In that case, only the Displayport connected monitor was recognized.
Now I have switched to
monitor 1: HDMI
monitor 2: Displayport
and this seems to be the better option!
Does this make any sense?
Ok, for me the most important thing is that it is WORKING now! ;-)
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