Same here with Lide 25.
Additionally the scanner was not recognized by udev and I had to add the
following to /etc/udev/rules.d/45-libsane.rules:
# Canon CanoScan N670U/N676U/LiDE20
SYSFS{idVendor}=="04a9", SYSFS{idProduct}=="2220", MODE="664", GROUP="scanner"-- Canon Lide25 (plustek backend) scanner does not scan via gui https://launchpad.net/bugs/85488 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
