AcerScan 620UT

Overview
The AcerScan 620UT is a color USB page scanner.

Linux
It can be made to work with Linux, although some tinkering is required because of the proprietary firmware driver file which has to be uploaded each time the scanner is turned on. The firmware file must be copied from the manufacturer's driver set and SnapScan (Linux scanning software) must be configured to upload it, which fortunately is pretty easy.

scanimage -x 100 -y 100 --format=tiff >image.tiff When this command doesn't give an error, you've got the right one. (There may be other steps to take in between trying each firmware, possibly turning the scanner off, but I seem to remember that it just started working when I found the right .bin file.)
 * 1) Get a copy of the scanner's driver (for any OS, as far as I can tell). This will contain .bin files, which are the firmware for various versions of the scanner. (Ours was U64V120.bin.)
 * 2) Stash all the .bin files (or, if you know which one is the right one, just that one) in /usr/share/sane/snapscan
 * 3) edit /etc/sane.d/snapscan.conf so that the "firmware" line refers to the .bin file which is correct for your scanner. If you don't know which one, then try each one -- make the edit, save snapscan.conf, run sane-find-scanner and then:

Files

 * File:AcerScan drivers.tar.gz: all .bin firmware files included in the driver

Links

 * manufacturer's drivers at Benq's web site as of 2010-06-19, they don't seem to be available from Benq; I've uploaded them here