[Intel-gfx] i915: v5.10.23: kernel hangs at boot when external monitor is connected?!

[Thomas Meyer]

Hi,

when booting with an external monitor connected the boot process seems to stop
in the kernel. No additional output is show, it just hangs.

kernel is 5.10.23 and driver is i915. When unplugging and reset computer, the
system starts normal. Any ideas what could be the culprit and what to enable
in kernel config to get a bit more insight what's probably going on?

mfg
thomas