I had /etc/udev/permissions.d/99-local.permissions containing a single line for my scanner: # scanner sg3:root:disk:0666 However, this was ignored by udevstart. Apparently, once a match is found (/etc/udev/permissions.d/50-udev.permissions has a generic sg*:root:disk:0660 setting), you can't override it with a more specific rule. I solved the problem by renaming my local file to 00-local.permissions so it's parsed before the defaults, but it's really weird IMHO. Reproducible: Always Steps to Reproduce:
udev doesn't handle it on a best match basis, but on a first match basis. udev reads the files in increasing order and takes the first match it finds. Your own settings should go into a file smaller than 50-udev.permissions so that they are found before 50-udev.permissions.
