[sane-devel] HP 6300 scanner connect problem

[Ken Beals]

Trying to use a HP 6300 scanner with SANE. Particulars:
Ubuntu 10.10, kernel 2.6.35-28-generic-pae
Scanner connected through usb

Results of 'sane-find-scanner':
found USB scanner (vendor=0x03f0 [Hewlett-Packard], product=0x0601 [HP
ScanJet 6300C]) at libusb:005:002

here is /dev/bus/usb/005 directory:
crw-rw-r--  1 root root    189, 512 2011-05-13 20:22 001
crw-rw-r--+ 1 root scanner 189, 513 2011-05-13 20:51 002

device 001 is the root hub.

symlink to scanner is present in /dev:
lrwxrwxrwx   1 root root            15 2011-05-13 20:22 hp6350C ->
bus/usb/005/002

contents of /etc/sane.d/hp.conf:

/dev/hp6350C
  option connect-usb

running 'scanimage -L' with debug enabled (also tried as root) gives:

[sanei_debug] Setting debug level of hp to 128.
[hp] sane_init called
[hp] hp_init: global.is_up = 1
[hp] sane_init will finish with Success
[hp] sane_get_devices called
[hp] hp_read_config: hp backend v1.06/$Revision$ starts reading config file
[hp] hp_read_config: processing line </dev/hp6350C>
[hp] hp_read_config: processing line <option connect-usb>
[hp] hp_read_config: attach /dev/hp6350C
[hp] hp_attach_matching_devices: attach matching /dev/hp6350C
[hp] hp_attach: "/dev/hp6350C"
[hp] hp_get_dev: New device /dev/hp6350C, connect-usb, scsi-request=0
[hp] sanei_hp_device_new: /dev/hp6350C
[hp] hp_GetOpenDevice: device /dev/hp6350C not open
[hp] hp_nonscsi_open: open usb with "/dev/hp6350C"
[hp] hp_nonscsi_open: open device /dev/hp6350C failed
[hp] nonscsi_new: open failed (Invalid argument)
[hp] /dev/hp6350C: Can't open nonscsi device
[hp] hp_read_config: reset to default config
[hp] sane_get_devices will finish with Success

No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).
[hp] sane_exit called
[hp] hp_destroy: global.is_up = 0
[hp] sane_exit will finish

I see the 'invalid argument' but I don't know what it is complaining about.

Are the major/minor numbers for /dev/bus/usb/005/002 OK? Everything
I've read says major 180 for scanners.

What am I missing?

thanks,

Ken