On Tue, May 18, 2010 at 7:14 AM, Kurt Rosenfeld <hardware at ee.ccny.cuny.edu> wrote: > Gernot, > > This is the stderr output of scanimage with DEBUG_SANE, > DEBUG_SANE_SANEI_USB, and SANE_DEBUG_DLL all set to 255: > http://acm.poly.edu/~kurt/scanimage_all255.txt > > Here is the stderr output of scanimage -d test > with SANE_DEBUG_TEST set to 255: > http://acm.poly.edu/~kurt/scanimage_-d_test.txt > > thanks, -kurt > > On Mon, May 17, 2010 at 01:09:23AM +0900, Gernot Hassenpflug wrote: >> Hello Kurt, >> >> I am concerned about this part of the log file: >> >> [pixma] pixma_open(): Canoscan 8800F >> [pixma] WARNING:pixma_write(): count(0) != len(16) >> [pixma] OUT ?T=3.054 len=-1 >> [pixma] ?00000000:ef 20 00 00 00 00 00 00 ?00 00 00 00 00 00 00 00 >> [pixma] ? ERROR: EIO >> >> It looks as though the scanner is not responding even at the start of >> the operation. Maybe you can try setting more debug options to 255:
Hi, looks like exactly the same. I thought we would see the raw USB operations now but apparently not: what I wanted to see was the USB attachment and configuration URBs. Since no I/O is possible at all, maybe the attachment or configuration is not going well. Q to the list: Are there any other DEBUG variables that can be set to see this kind of information? Otherwise, I recommend doing a USB snoop on a Windows machine (which I understand you do not have available) so I can try to see what if any differences there are to my scanner. No-one else has reported trouble using the 8800F, but I have no idea if Canon made different variations that require some tuning of the communication protocol. Regards, Gernot
