I neglected to add my libusb-0.1.12 information to the previous long configuration description, which apparently directly affects the udev device node mapping, permissions, etc.
I also found this forum comment: "What *should* happen is that the udev rules in /etc/udev/rules.d/60-libsane.rules get run, making a scanner-<whatever> symlink to /dev/bus/usb/XXX. This device is then chown'ed via pam_console, later by udev." Since I can't find a '60-libsane.rules' file anywhere, I'm not sure what the next step would be. Is this file normally installed by sane-backends? Thanks. # emerge libusb sane-backends sane-frontends -pv These are the packages that would be merged, in order: Calculating dependencies... done! [ebuild R ] dev-libs/libusb-0.1.12 USE="-debug -doc" 0 kB [ebuild R ] media-gfx/sane-backends-1.0.17 USE="gphoto2 usb v4l -ipv6" 0 kB [ebuild R ] media-gfx/sane-frontends-1.0.14 USE="gimp" 0 kB # equery files libusb [ Searching for packages matching libusb... ] * Contents of dev-libs/libusb-0.1.12: /usr /usr/bin /usr/bin/libusb-config /usr/include /usr/include/usb.h /usr/include/usbpp.h /usr/lib /usr/lib/libusb-0.1.so.4 -> libusb-0.1.so.4.4.4 /usr/lib/libusb-0.1.so.4.4.4 /usr/lib/libusb.a /usr/lib/libusb.la /usr/lib/libusb.so -> libusb-0.1.so.4.4.4 /usr/lib/libusbpp-0.1.so.4 -> libusbpp-0.1.so.4.4.4 /usr/lib/libusbpp-0.1.so.4.4.4 /usr/lib/libusbpp.a /usr/lib/libusbpp.la /usr/lib/libusbpp.so -> libusbpp-0.1.so.4.4.4 /usr/lib/pkgconfig /usr/lib/pkgconfig/libusb.pc /usr/share /usr/share/doc /usr/share/doc/libusb-0.1.12 /usr/share/doc/libusb-0.1.12/AUTHORS.gz /usr/share/doc/libusb-0.1.12/NEWS.gz /usr/share/doc/libusb-0.1.12/README.gz