[sane-devel] Problem with scanner Plustek OpticPro U12 and scanimage (sane_start: Device busy)

[sciencisto-debian at yahoo.es]

Hi.

I've got a Plustek OpticPro U12 scanner (it's a little old) running
under Debian "Etch".

I have installed SANE and the scanner works fine with xsane,
xscanimage, kooka, quiteinsane,... but not with scanimage.

When I try to do a multi-scan with scanimage like this:

scanimage -p --batch-count 5 --bath-prompt (y some other options)

it works fine with the firts scanned page, but after press RETURN for
the second page to be scanned, scanimage says:

scanimage: sane_start: Device busy

and then the scanner is switched off and scanimage ends without scan
anymore (the result is the same one if I don't use --batch-prompt, of
course). When I say "the scanner is switched off" I mean that the
only way to make any program (scanimage -L, xsane, etc., reports that
there is no scanner; but in fact sane-find-scanner can detect it!)
seeing it again is unplugging it from the current line (or the USB
port) and pluggin it again.)

In the other hand, if I do multi-scan with any frontend (xsane,
quiteinsane, etc.), it works fine. Why, then, doesn't it work from
the command line using scanimage? (and what command do these programs
make use of to do a multi-scan?). It is strange, isn't it? 

Any idea? What can I do? What is wrong?

Thanks in advance.


ps I have tried out with another scanner (an HP) and the previous
command:

scanimage -p --batch-count 5 --bath-prompt (y some other options)

works just like it's supposed to work (I mean, it scans five times).

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