plustek@linuxhacker.org

Hi,

it seems, that libusb has some problems on Mac OS X. Go back at least
to 0.1.7 and try enabling the debug messages: 
export SANE_DEBUG_SANEI_DEBUG=255
reduce the 255. Up to the point where it works. It has been reported, that
enabling these messages, it works...

Maybe Martin Ellert, knows more about this issue...

Ciao,
  Gerhard

BTW: Disable all other backends in dll.conf


On Mittwoch, 24. Dezember 2003 05:19, Aaron Burghardt wrote:
> Hi all,
>
> I have a Canon N670U and installed TWAIN SANE from this site:
>
> 	http://www.ellert.se/twain-sane/
>
> It's a TWAIN interface for OS X built on SANE and libusb. I can find my
> scanner with sane-find-scanner:
>
> ...
> found USB scanner (vendor=0x04a9 [Canon], product=0x220d [CanoScan],
> chip=LM983x?) at libusb:025:002
>    # Your USB scanner was (probably) detected. It may or may not be
> supported by
>    # SANE. Try scanimage -L and read the backend's manpage.
> ...
>
> But if I try to actually use the scanner, it fails to open. With
> version 0.1.8beta of libusb, turning on debugging output and running
> scanimage -L reports:
>
> 	[plustek] Found device at >libusb:025:002<
> 	[plustek] open failed: -1
> 	[plustek] sane_get_devices (0xbffff840, 0)
>
> If I revert to libusb 0.1.7, I get this:
>
> 	[plustek] Found device at >libusb:001:002<
> 	[plustek] Vendor ID=0x04A9, Product ID=0x220D
> 	[plustek] usbio_DetectLM983x
> 	[plustek] UIO error
> 	[plustek] This is not a LM9831 or LM9832 chip based scanner.
> 	[plustek] open failed: -1
> 	[plustek] sane_get_devices (0xbffff800, 0)
>
> Is this a problem with libusb or with the plustek back-end? Any ideas
> on how to fix it?
>
> Thanks,
> ----
> Aaron Burghardt
> aburgh@mac.com
>