[gentoo-amd64] USB scanners and udev

[Peter Humphrey <prh@gotadsl.co.uk>]

Also not, perhaps, a 64-bit problem, but can someone please confirm that 
they can plug a USB scanner in and have it work? I have an Epson Perfection 
640U which works under M$ but not Gentoo.

I'm trying to follow gentoo-wiki.com/HOWTO_Installing_USB_Scanner, although 
it's not easy with so many variations being covered in the one document. I 
get as far as:

# sane-find-scanner -q
found USB scanner (vendor=0x04b8 [EPSON], product=0x010c [Perfection640  ]) 
at libusb:002:007

...but:
# scanimage -L

No scanners were identified. [...]

I can locate the /dev/usbdev* devices that are created when I plug the 
scanner in; changing their ownership to root:scanner has no effect on 
scanimage. I am in the scanner group, but running as root makes no 
difference anyway.

Udev is at version 106, kernel 2.6.20, hotplug is started in the default 
run-level (though it seems to make no difference); what else can I say?

Do I have to write a udev rule? /lib64/modules/2.6.20-gentoo/modules.usbmap 
contains nothing pertaining to my scanner, or is this a red herring?

/proc/sys/kernel/hotplug contains a single blank line. Another red herring?

-- 
Rgds
Peter Humphrey
Linux Counter 5290, Aug 93
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