Bug#1003160:

as an update to the report above, I since noticed that this issue also occurs if I try to boot from the 5.10.0-10 kernel instead of the original 5.10.0-09

Bug#1003160: DisplayPort External Monitor no longer recognised after update to kernel 5.15

Package: xserver-xorg-video-nouveau Version: 1:1.0.17-1 Severity: normal Dear Maintainer, * Since Debian upgrade from Bullseye/Stable with kernel 5.10 to Bookworm/Testing with 5.15 kernel, the external monitor connected with DisplayPort on macbook 5.1 (late 2009) is no longer recognised and