[sane-devel] CanoScan N650U (plustek backend) not working with Mac OS X 10.3.2 build 7D24

[Henning Meier-Geinitz]

Hi,

On Tue, Dec 23, 2003 at 04:24:13AM +0100, Henrik Rintala wrote:
> With both versions the problem is that scanimage does not seem to be 
> able to connect to the scanner.

[...]

> Henrik-Rintala:/usr/local/bin shr$ ./sane-find-scanner
 
> found USB scanner (vendor=0x04a9 [Canon], product=0x2206 [CanoScan], chip=LM983x?) at libusb:024:002

The question mark after the chip id is a bad sign. It means, that
sane-find-scanner was unable to actuall talk to the scanner. It could
get its didentification but sending commands failed (usually because
the interface couldn't be claimed).

> Henrik-Rintala:/usr/local/bin shr$ ./scanimage -L
> 
> No scanners were identified. If you were expecting something different,

[...]

Try enabling debug message. E.g.
export SANE_DEBUG_PLUSTEK=255
export SANE_DEBUG_SANEI_USB=255

To reduce the number of USB messages, diable everything but plustek in
dll.conf.

There have been some reports that enabling debugging "fixes" libusb
problems on MacOS X in some cases. Even if it doesn't, you should get
a debug log that shows the exact error message.

Also have a look at the archive of the last few weeks of sane-devel.
There have been some similar reports.

Bye,
  Henning