Originally loaded Solus (from about 4.3) onto the PC but have never installed Nvidia drivers (probably out of support by that time anyway). The setup worked without any display issues or black screens up to the mid-Dec 24 updates when I started getting the black screen after logging in to Budgie (note the login screen displays properly).
Have now loaded Xfce onto the same PC - Solus 4.7 Endurance, Xfce 4.20, Linux kernel 6.12.9-312.current. Software is up-to-date and no Nvidia drivers are installed. There are no issues with the display or occurrences of black screens.
Is anyone able to explain to me why the black screen after login to Budgie is an Nvidia driver issue and to revert to an LTS version of the kernel?
Thanks.