I don't think you are supposed to install both the prebuilt nvidia modules and the dkms variant:
Setting up linux-modules-nvidia-560-6.11.0-13-generic (6.11.0-13.14+1) ... ... Setting up nvidia-dkms-560-open (560.35.03-0ubuntu5) ... -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers-560 in Ubuntu. https://bugs.launchpad.net/bugs/2092808 Title: package linux-image-6.11.0-13-generic 6.11.0-13.14 failed to install/upgrade: run-parts: /etc/kernel/postinst.d/dkms exited with return code 11 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-560/+bug/2092808/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp