Hi! I have been afflicted by this issue too, and I have found a possible workaround. If you boot into kernel 5.8.0-3, and run `dpkg-reconfigure nvidia-kernel-dkms`, a usable kernel module is produced for that kenel. Then, you can reboot or just `modprobe nvidia` and restart your X server.
Another "workaround" is upgrading to the nvidia driver packages at version 450.80.02-1, already included in sid. This implies that the bug has thankfully been already fixed. Bálint Kovács
