Peter Kirchgessner <peter at kirchgessner.net> wrote: > I have no problem if the usleep(1000) is added. If it helps, it's > ok. For a typical scan about 200 inquiries are done. So setting up the > scanner is slowed down by 0.2 seconds in total. That is far less than > the scan will need. > I don't know if it is possible with libusb to check if an answer of > the scanner is available or not. But if you tried increasing the value > and it still did not work every second run I would say there are still > some other problems with USB. My ScanJet 6250 is working without > problems for years using USB.
Thanks for looking at it. Maybe we have different hardware, in spite of the identical model numbers. Mine is 9 or 10 years old. I don't recall if I ever updated the driver. Do you know which you have? > Who will apply the patch to the official SANE-backends ? Who do we prod? ;-)