Thanks for this thread, Peter B. I had precisely the same issue with my Epson Perfection 3490 -- but with a Twist. I recently had a short power outage (actually just a blown circuit breaker). Because the computer did not power down properly, the scanner was not sent a power-down signal, and I began getting the "snapscan libusb invalid argument" error. Logging out and in, or rebooting Linux, did not solve them problam.
It's a dual-boot machine, and booting into XP and back into Linux solved the problem. Does any one know whether there is a way to reset the scanner by sending the power-down and power-up signals to the scanner using sane-utils or some other Linux program? -- scanner port detection https://bugs.launchpad.net/bugs/239930 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
