[sane-devel] Canon DR-2020U incompatible with canon_dr

[Fabian Eichstädt]

Hi all!
We recently aquired a Canon DR-2020U scanner and I tried to test it
with a recent sane git-snapshot. It compiled without problems and
I tried to use it with the canon_dr backend. This failed.
Allan Noah told me that this model uses a very different control method
than the other "DR" scanners and thus the canon_dr backend cannot work.

I made a scan with Windows XP and logged the USB Commands with USBSnoop.
This logfile is available for download here (ca. 4.3 MB):
http://dl.dropbox.com/u/3879521/CANON-DR2020U_UsbSnoop.log.bz2

Maybe this is helpful for somebody interested in creating a suitable backend
for this scanner. I would be glad to be able to use this scanner with Linux.

Regards,
      fabz