Comment 28 for bug 465055

I have an HP Photosmart C3180. I was having this problem, but "sudo adduser saned lp" fixed it for me. No need to add yourself to any groups, downgrade libsane, or muck around with udev. If your scanner is not an all-in-one, the addition of the udev rule will probably be necessary, but you shouldn't need to add yourself to the sane group, the daemon takes care of that.