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Add SANE scanner support for OS X 10.2, 10.3
Authored by: Kool on Dec 27, '03 11:56:56AM

Hello!

I had problems getting the TWAIN SANE interface working for my UMAX 1220U. So I wrote a little app instead as a frontend to the driver from SANE. It is available at http://www.geo.uu.nl/~kool/software.shtml

Please note that if you have trouble getting the SANE driver to work it might be a good idea to use the latest libusb avialable from http://libusb.sf.net

Good luck!

Johan Kool



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Add SANE scanner support for OS X 10.2, 10.3
Authored by: rayrem on Jun 26, '04 04:55:09PM

Thanks so much. I suspect I'm about your Dad's age so consider it tested again. Worked at 150 and Auto, but at 600 I got a very distorted image.



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Add SANE scanner support for OS X 10.2, 10.3
Authored by: blouis on Aug 21, '04 08:01:41PM

Perhaps the answer is in a hint on Ellert's web page:
http://www.ellert.se/twain-sane/faq.html

"One common reason that backends that works on other platforms does not work on MacOS X is that they use a fork to create a reader process. This does not work on MacOS X and the backend should be reimplemented using pthreads instead."

I installed the components from his page and tried using graphic convertor with my Epson GT-7000. The right driver appeared, but didn't scan.

Scanner is recognisable, but won't scan:

$ sudo sane-find-scanner
...
found USB scanner (vendor=0x04b8 [EPSON], product=0x0101 [Scanner GT-7000]) at libusb:003:002-04b8-0101-ff-ff
# Your USB scanner was (probably) detected. It may or may not be supported by
# SANE. Try scanimage -L and read the backend's manpage.

On a single occasion, scanimage recognised my scanner, many other times it did not:
$ sudo scanimage -L

device `epson:libusb:003:002-04b8-0101-ff-ff' is a Epson GT-7000 flatbed scanner

So if someone knows how to implement "pthreads" instead of "forks" in the backend, that might fix it.



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Add SANE scanner support for OS X 10.2, 10.3
Authored by: blouis on Aug 25, '04 07:10:18AM

Further poking around has revealed the bug might lie somewhere else. (perrhaps in USB routines). Hopefully those working on the SANE project who know more about these things willl be able to fix it soonish.

More detail is in the SANE bug tracking pages.


Ian.



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