One additional note: Some time before the system upgrade I did a minor modification to the grub configuration. Apparently, the update process wants to ask which version of the configuration to install. But due to some unknown reason, the window manager is not useable at that time.
One additional note: Some time before the system upgrade I did a minor modification to the grub configuration. Apparently, the update process wants to ask which version of the configuration to install. But due to some unknown reason, the window manager is not useable at that time.