When I attach an external monitor (an LG 27UD68p-B) over USB-C, I get relatively regular (multiple per day) hangups.
This happens on a Dell XPS 15 7590 laptop running
Linux rigter 5.7.0-rc1 #1-NixOS SMP Thu Jan 1 00:00:01 UTC 1970 x86_64 GNU/Linux (drm-tip at commit 18043327e8a9cba095bca9f80cdc70900a51f92c).
I've attached the kernel log kernellog.txt - this is not with debug information yet, will look into that later.
Let me know if there's anything I can do to help further pinpoint what's going on!