Hello, I am having problem using my HP ScanJet 6300C with libusb and xsane+sane backend from debian testing. I have also tried debian etch version on another computer with same issues, and I even tried downgrading my sane backend (then it went completely insane and almost broke the scanner). Right now im testing on a cometely fresh install of Debian/testing.
There are no scanner modules loaded/in kernel and the kernel is PREEMPT 2.6.23.9 When I do a scan, it waits about 6-8 seconds before scanning (just like it is calibrating), then it moves the scanner head back and forth while scanning (only when i get over approx. 200dpi) I did read somewhere on this mailinglist, that it had to do with USB bandwidth, so the scanner must wait at above 200dpi for the transfer of data to complete over USB. I'm using it with a high-speed USB 2.0 hub, so i dont see how there could be any kind of transfer-bottleneck. I tried adding 'option enable-image-buffering' to top of /etc/sane.d/hp.conf just like man sane-hp says to make it global, with no results. I tried enabling debugging a few times, the output didn't seem useable, but I can post it if needed. I have had the same issues with a plustek scanner (Canon LIDE 30) and libusb: grinding noise and scanner head moving forth and back while scan > 200dpi. Can anybody help me sort this out? best regards Michael Ole Olsen gnu at gmx.net
