I don't use the scanner daily, so I'm not completely certain. But as far as I remember, the problems started in ubuntu 16.04 with a kernel 4.4.x. At that time, I tried to go back to a prior kernel version, but that failed for nvidia video driver reasons.
There is quite a number of problem reports at the sane mailing list (sane-de...@lists.alioth.debian.org) - on the avision backend, and as well on USB problems with other backends. Here is one recent example: http://lists.alioth.debian.org/pipermail/sane-devel/2017-January/034968.html -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to sane-backends in Ubuntu. https://bugs.launchpad.net/bugs/1643544 Title: HP Scanjet 7400c Scanner locks USB2 port Status in sane-backends package in Ubuntu: Incomplete Bug description: When trying to scan with the hp7400c (avision backend), the scanner will stop in the middle of the page, no further commands on a USB mouse or keyboard are possible. xsane will throw a I/O device error. This happens on my desktop with ubuntu 16.10 (Kernel 4.8.0-27) and my laptop (kernel 4.4.0-38) NO USB3 hardware is involved in my case, both machines have USB2-ports only, lsmod does NOT show and xhci modules loaded. I tried the command SANE_DEBUG_AVISION=8 SANE_DEBUG_SANEI_USB=5 scanimage > scanfehlerxx.txt and produced the files attached. The key statement might be: [sanei_usb] sanei_usb_read_bulk: trying to read 61054 bytes [sanei_usb] sanei_usb_read_bulk: read failed: No such device (it may have been disconnected) [avision] read 0 bytes [avision] No data arrived. This error occurs as well with Fedora 24, but NOT with debian 8.6. So it may be related with the more recent kernels and their behaviour on the USB ports. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sane-backends/+bug/1643544/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
