Created attachment 854406 [details]
syslog and Xorg logs from boot with autologin

I upgraded my Laptop (Lenovo T460p, Skylake/Optimus) from TW
20211107->20211203.

After the update, the X screen (sddm login) is black.  X/sddm is running, and I
can switch to another VT that will work.

I tried bypassing the login screen by setting autologin, now X (and other
applications) dump core, and login screen is started again (with black screen).

I can switch to the intel graphics (HD530), that will work.  But nvidia
module(s) cannot be unloaded.

nvidia card is an GM108M [GeForce 940MX], drivers (G05) are from the nvidia
repo.

Logfiles (syslog and Xorg) attached.

I can boot the old snapshot RO, things work there.  I tried booting the current
system with the old kernel (5.14.14-1), but that did not work.

I have another computer (desktop) with TW 20211126, same nvidia drivers, but
'full' card (GM204 [GeForce GTX 980]), kernel is a bit older (5.15.3) but also
5.15.  No issues there.