I have the USBc to HDMI connector from Dell, to connect my XPS13 to a second LG monitor.
I have been using it without problems for 2 years. I use it every day. Same setup.
Since friday 29/12 it stopped working.
I tried to connect my laptop to different monitors. I did driver updates and even tried to roll back my Intel driver. I disabled the WIFI. (and tried putting it on airplane mode). But nothing helps.
I guess some of those latest BIOS updates, HD driver update, ... caused the problem.
Can somebody please help. It's urgent. I need my laptop+second screen for my work.
Thanks for the tip. But it didn't help.
Last windows update was from 18th december. And my system worked well untill 29th.
I uninstalled it anyway, and prevented it from installing again.
But the problem is still there.
And I can't do system restore because I don't have restore points set.
Hopefully tomorroiw they deliver a new USBc-HDMI adapter, so I can test if my dell adapter is maybe broken.