[sane-devel] HP4470c - OSX - USB intermittently working

[Richard Bakker]

I have the weirdest experience with SANE - OSX, USB and a HP4470c

When I unplug the USB, reconnect and execute some tests (stripped  
output):

-------------------------
Macintosh:~ richardbakker$ sane-find-scanner
found USB scanner (vendor=0x03f0, product=0x0805, chip=rts8801/ 
rts8891) at libusb:004:003-03f0-0805-00-00

Macintosh:~ richardbakker$ sane-find-scanner
found USB scanner (vendor=0x03f0, product=0x0805, chip=rts8801/ 
rts8891) at libusb:004:003-03f0-0805-00-00

Macintosh:~ richardbakker$ sane-find-scanner
found USB scanner (vendor=0x03f0, product=0x0805, chip=rts8858c?) at  
libusb:004:003-03f0-0805-00-00

Macintosh:~ richardbakker$ scanimage -L
No scanners were identified.

Macintosh:~ richardbakker$ sane-find-scanner
   # No USB scanners found.


-------------------------

I can reproduce this output by unplugging the USB and/or power and  
reconnect.
I managed once to scan using PS CS4, second scan - "No devices found"






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