(04-17-2017, 03:39 PM)Peejay link Wrote: I've had my N650U for a long time and it's always been perfectly OK for me. I've never got it to work in Ubuntu, though, and a lot of derivatives, but it has worked in Linux Mint and in Linux Lite, which I adopted at 3.2. Now I'm up-to-date with 3.4 I'm back to googling for solutions that actually work.
Checking at http://www.sane-project.org/sane-mfgs.html gave this info:
Model Interface USB id Status Comment Backend Manpage
CanoScan N650U/N656U USB 0x04a9/0x2206 Complete plustek (0.52) sane-plustek
Using sudo sane-find-scanner produced this:
>could not fetch string descriptor: Input/output error
>could not fetch string descriptor: Input/output error
>found USB scanner (vendor=0x04a9, product=0x2206) at libusb:003:002
and sudo scanimage -L gave me "No scanners were identified."
I've checked the presence of the stated backend and all seems to be in order and lsusb identifies the device too, but no connection can be made to it, it seems.
I've also checked that the scanner does still work and on an older laptop it still does, so not a hardware issue.
If the worst comes to the worst I can revert to 3.2 - but I really like the upgrade - or I could have a go at a VB version of a suitable distro, but both seem rather heavy going given that the scanner worked fine before I did the upgrade.
I've seen enough of scanner Q&As to know that the answer is rarely clearcut or universally applicable but I would be very grateful for any suggestions. Well, not quite ANY perhaps!
I live in hope!
I've just read through the thread as I was searching for a print solution in printers and scanners....however, I have the exact same scanner, and I've just plugged it into another distro I use and it works I've not tried this on LL as my version is a clean 3.4, the application is on Launchpad https://launchpad.net/simple-scan no idea if this would work but might be worth a try.
Another option might be to remove sane; apt remove --purge then apt autoremove then reinstall it.