Bug#1043031: Probably not a bug in xserver-xorg

[Benjamin Gufler]

I found the external monitor working when booting 
linux-image-6.3.0-2-amd64. It doesn't work with 
linux-image-6.4.0-1-amd64 or linux-image-6.4.0-2-amd64.
So probably this bug should be reassigned to the kernel package