Hi everyone, as I read one can get support on this Mailinglist, I shall give it a shot with my setup. I have a running raspbian (Buster / 10 / PI 3B+) with all packets upgraded every 24h.
Sane Version is: -- scanimage -V scanimage (sane-backends) 1.0.27; backend version 1.0.27 -- When connecting a Canon LiDE 120, sane-find-scanner gives me: -- [...] found USB scanner (vendor=0x04a9 [Canon], product=0x190e [CanoScan]) at libusb:001:008 [...] -- which is stable over hours and days. Problem occurs with scanimge -L. About 10 seconds after pugging in the scanner, the device gets detected: -- device `genesys:libusb:001:008' is a Canon LiDE 120 flatbed scanner -- After these ~10 seconds it disappears and does not come back. unplugging it and replugging gives another 10 seconds. I suspected a power issue, because the LiDE 120 draws it's power via USB. Unfortunately using a powered hub or a 10Amp power supply does not change anything. The scanner works without a problem connected to an Ubuntu notebook with the same sane Version. Tested with USB Hub and without. I already addressed this problem in the IRC and a friendly idler reproduced the issue. Thanks for any efforts Martin
