Comment # 20 on bug 1225296 from Martin Schmidt

Some additional information:
meanwhile in the main repository repo-oss there is a new kernel version. I have
also installed this. Now I have:
6.4.0-150600.17.2
6.4.0-150600.21.2

17.2 comes from @System, Vendor Suse LLC.

Booting from the 21.2-kernel ends up with single screen system, now on the
first screen, but with only 640x480 resolution. 

Using yast to scan through all installed packages found with keyword "kernel"
reveals more related parts (kernel-option etc.) that have a different version
number in the last digit, when insatlled from the repository repo-oss. I
upgraded all installed packages to the latest version, always from the repo-oss
repository. Rebooting again leads back to the old behaviour as reported -
single but highly resolving display 2. 

For me it is confusing that booting with identical driver packages but
different kernels leads to varying display configurations. 

I just do not know how kernel and drivers interact. Could it be that the
problem is a new kernel that cannot make proper use from the driver? May be the
choice of repositories that I've got is not appropriate? It is confusing for me
that modprebe -D nouveau gives very different result with kernal 5.15 and 6.4. 
Cheers