Hi,

I'm in a tricky situation -- at work I have a Opteron workstation
running the antiquated RHEL3 os with no opportunity by me to upgrade
anything except by installing newer versions of software in my user
prefix (I can gain root access to tweak hotplug scripts, etc, but
shouldn't upgrade system packages).  I've installed libusb-0.1.12,
sane-backends-1.0.19 and sane-frontends-1.0.14 in my user prefix.

I'm trying to get a Canon LiDe25 scanner working here (it works fine at
home with my newer machines).

This is the tail of the error I get from scanimage -L:

[sanei_usb] sanei_usb_open: opened usb device `libusb:001:017' (*dn=0)
[sanei_usb] sanei_usb_get_vendor_product: device 0: vendorID: 0x04a9,
productID: 0x2220
[sanei_usb] sanei_usb_write_bulk: trying to write 4 bytes
[sanei_usb] 0000: 01 69 00 01
.i..............
USB error: error submitting URB: Invalid argument
[sanei_usb] sanei_usb_write_bulk: write failed: Invalid argument
[sanei_usb] sanei_usb_close: closing device 0

And here's an ominous /var/log/messages entry:

Feb 20 10:22:26 myhost kernel: ioctl32(scanimage:17106): Unknown cmd fd(3)
cmd(
802c550a){00} arg(ffff50f0) on /proc/bus/usb/001/017

I've had hotplug USB errors on this box before when too many things were
plugged
in (order of hotplug is important).  So I'm using a powered USB hub to power
the scanner
but the results haven't changed.

The scanner is on 1/17:
$ lsusb
Bus 001 Device 017: ID 04a9:2220 Canon, Inc.

Any pointers on what these messages mean?
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