I updated to 3.19.12 this morning. That is the kernel that gave me a black screen. I tried going back to 3.19.11 which used to work. It no longer does. Both these kernels give me a black screen.
Kernel 3.19.8 actually works for me. So did 3.19.9 and 3.19.10 (which is the one I am using now) so I have options to still have a running machine. This is nice.
Ok, then it may be that the driver was not properly built for that kernel.
What I have done at times for problems related to video is to
remove the offending kernel in its entirety along with the nvidia drivers. sudo dnf remove kernel*5.19.12* *nvidia*
Note that this will not affect the current running system since the modules are already loaded.
reinstall the updated kernel sudo dnf upgrade --refresh
reinstall the nvidia drivers with cuda sudo dnf install akmod-nvidia xorg-x11-drv-nvidia-cuda
wait at least 5 minutes to ensure the modules have time to rebuild.
verify the modules have been built sudo dnf list installed kmod-nvidia
after step 5 shows the kmod has been built properly then reboot.
I developed this procedure after seeing a similar issue with an update back in fedora 34 and it has worked a couple times with issues since.
AFAICT it seems it may be related to rebooting too soon after an update so the modules are only partly built and thus fail to function.
The only time I have seen this on my desktop was with 5.19.8 & 5.19.9. Nothing else has done so before or after. I simply booted to the older kernel and followed the steps above and it booted properly the next time.