John Coppens wrote:
> Hello all.
> No one bit the first time around. I still get hangs while transferring
> images from the Snapscan scanner to the computer. A new hint: after
> the hang, I try to rmmod the module 'uhci.o', which normally works,
> then try to re-insmod it, which sometimes works, but at times segfaults
> during initialization, and then cannot be removed.
> I'd really appreciate a suggestion!
> > I just recompiled sane/xsane for the 2.4.5 kernel I installed, hoping the
> > problem would disappear, but no luck.
> > When I scan (snapscan 1212U) an image with lots of white (probably
> > saturated), the transmission to the PC hangs. Lowering contrast, or
> > even turning the original 90 degrees, solves the problem. I suspect the
> > image data is compressed when sending though USB. Could there be an
> > bug in the protocol? Either in the Snapscan firmware, or at the receiving
> > end?
> > John
A USB snapscan scanner uses exactly the same host communication protocol
as a SCSI one, and no compression is used. Apart from that I can't help
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