Comment # 16 on bug 1230779 from Stefan Dirsch

Installation looks correct to me. You have installed

kernel-devel-6.10.11-1.1.noarch
kernel-default-devel-6.10.11-1.1.x86_64
kernel-default-6.10.11-1.1.x86_64

You're running 

Kernel Version: 6.10.11-1-default (64-bit)

This is also correct:

~> sudo modinfo nvidia_drm
[sudo] Passwort für root: 
filename:       /usr/lib/modules/6.10.11-1-default/updates/nvidia-drm.ko
version:        550.120

No idea why you see this.

Okt 04 19:07:50 localhost.localdomain kernel: NVRM: API mismatch: the client
has the version 550.120, but
                                              NVRM: this kernel module has the
version 550.107.02.  Please
                                              NVRM: make sure that this kernel
module and all NVIDIA driver
                                              NVRM: components have the same
version.
Okt 04 19:07:50 localhost.localdomain kernel: NVRM: API mismatch: the client
has the version 550.120, but
                                              NVRM: this kernel module has the
version 550.107.02.  Please
                                              NVRM: make sure that this kernel
module and all NVIDIA driver
                                              NVRM: components have the same
version.

This makes no sense to me.