Comment 6 for bug 485551

It seems that the libsane people have made some serious changes to libsane version 1.0.20, and have broken compatibility with all the frontends. XSane, xscanimage, and any other frontend I've tried cannot find my CanoScan LiDE 50, even though my scanner is working fine with Windows XP via Sun VirtualBox with USB passthrough.

sane-find-scanner seems find the scanner, and reports:

found USB scanner (vendor=0x04a9 [Canon], product=0x2213 [CanoScan], chip=GL841?) at libusb:001:012

but no frontend can use it. scanimage reports "no SANE devices found".

I've searched for a way for downgrade to libsane version 1.0.19, but I've found no easy way to do this.