Comment 6 for bug 2037004

Initially, the warning/error "udevadm hwdb is deprecated. Use systemd-hwdb instead." repeats 6 times (either as described above, or when running "ubuntu-drivers devices"). After adding ppa:graphics-drivers/ppa, the warning/error repeats 8 times. The number of repeats seems to correspond to the number of driver options (not counting nouveau). Also, nvidia-driver-545 appears after adding the ppa, but 550 does not.

$ ubuntu-drivers devices
udevadm hwdb is deprecated. Use systemd-hwdb instead.
udevadm hwdb is deprecated. Use systemd-hwdb instead.
udevadm hwdb is deprecated. Use systemd-hwdb instead.
udevadm hwdb is deprecated. Use systemd-hwdb instead.
udevadm hwdb is deprecated. Use systemd-hwdb instead.
udevadm hwdb is deprecated. Use systemd-hwdb instead.
udevadm hwdb is deprecated. Use systemd-hwdb instead.
udevadm hwdb is deprecated. Use systemd-hwdb instead.

...

driver : nvidia-driver-545 - third-party non-free recommended
driver : nvidia-driver-470 - distro non-free
driver : nvidia-driver-545-open - third-party non-free
driver : nvidia-driver-535-server-open - distro non-free
driver : nvidia-driver-470-server - distro non-free
driver : nvidia-driver-535-server - distro non-free
driver : nvidia-driver-535-open - distro non-free
driver : nvidia-driver-535 - distro non-free
driver : xserver-xorg-video-nouveau - distro free builtin