DNF Upgrade from F38 to F39 Issues

[Stephen Morris]

Hi,
     I used dnf system-upgrade to upgrade from F38 to F39. After the 
upgrade when I booted into gdm to login and start KDE, the machine hung 
on KDE startup into X11.
     Thinking it might be an nvidia UEFI enrolment issue with the F39 
nvidia drivers, I reset the machine and booted back into gdm.
     I then used ctrl+alt+F2 to start a terminal interface. In that 
terminal I went through the UEFI enrolment process but that said the 
drivers were already enrolled.
     I issued dmesg to see if there were any nvidia failure messages, of 
which there none, but I did notice there were initialisation and what 
looked like failure messages from Nouveau, but I don't understand why 
there would be an Nouveau messages at all when Nouveau is blacklisted in 
the kernel parameters in grub.
     I then uninstalled all the nvidia drivers that were present. I then 
used ctrl+alt+delete to reboot from the terminal. That process hung for 
1.5 minutes waiting for a job stop (I don't remember what it was waiting 
on), and, when the 1.5 minute timer finished it then hung waiting for 
XWayland to shut down. Why was it waiting for XWayland to shut down when 
I don't use Wayland, I only use X11?
     On reboot, I started up KDE under Nouveau, which doesn't work 
properly with my BENQ 4K monitor, it can't determine what the monitor 
is, so doesn't run in the right resolutions, although it does honour the 
display scaling specified when using the nvidia drivers (which do 
recognise the monitor and set things up properly).
     I reinstalled the nvidia drivers and a subsequent reboot then 
booted into KDE with any issues (which is where I'm sending this email 
from). Why did this freezing of the nvidia drivers happen, is it because 
the F39 nvidia drivers don't work properly with an update and have to be 
installed from scratch to work properly?
     Also, after reinstalling the nvidia drivers, at the gdm login 
screen the display manager selection options only showed "Gnome", "Gnome 
Classic" and "Plasma/X11", where are the options for all of those to 
swap them between Wayland and X11 if I want to, that were present in F38 
before the upgrade to F39?

regards,
Steve