Comment # 11 on bug 1174406 from Larry Finger

The USB rules file should NOT be in /etc/udev/rules.d/. The correct directory
is /usr/lib/udev/rules.d/. The mouse and keyboard are never treated as USB
devices, even though they may be attached in that way. The virtual mouse and
keyboard devices are attached to the abstracted host devices.

I am surprised that /etc/udev/rules.d/ has any files given the recent moving of
files from /etc into /usr/lib; however, my brand-new Leap 15.2 instance has
55-libsane.rules, 56-sane-backends-autoconfig.rules, and
70-persistent-net.rules in that directory. It appears that sane has not yet
been converted, but the persistent-net rule is a mystery.