I forgot to mention, but when this problems appears, unplugging and replugging the scanner (or switching it off and on) does not make the problem go away, as far as I have noticed. Only rebooting sometimes make things work.
Updated SANE from 1.0.22 (-7ubuntu1) to 1.0.25 (-git20150516-precise0) using Rolf Bensch's PPA (daily git snapshots, https://launchpad.net/~rolfbensch/+archive/ubuntu/sane-git). Now scanimage also reports an epson2 scanner besides the epkowa scanner. I believe this is because support for Epson Stylus Office BX305FW has been added in backend epson2 in SANE 1.0.25, according to the lists of supported devices available on the SANE website. Epson IScan has not changed, same version as reported. The reported behavior is still present (and still only on some boots, as reported). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1442111 Title: Scanner is correctly identified but scan fails with "sane_start: Invalid argument" as root, and rebooting the computer sometimes makes things work, sometimes not To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sane-backends/+bug/1442111/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
