Same issue. Ubuntu 22.04.1, latest kernel 5.15.0-48, latest nvidia-driver-515 for Nvidia A2.
It shows black screen on boot, but if I do ctrl + alt + f4, it allows me to get in the terminal.
Then if I do startx, it launches the desktop and everything is fine … right until the next reboot
Setting nvidia-driver-510 does not help, but setting nvidia-driver-470 fixes the problem…