USB and Scanners

[David Fletcher]

What I've now done is get rid of everything out of /etc/sane.d/ that looks as 
if it isn't necessary to use my Epson scanner. This directory now contains:-

[dave at boss sane.d]$ ls
dll.conf           dll.conf.rpmsave  epkowa.conf.original  epson.conf.rpmsave
dll.conf.orig      dmc.conf          epson.conf
dll.conf.original  epkowa.conf       epson.conf.original
[dave at boss sane.d]$

dll.conf has everything commented out except epson and epkowa.

The contents of my other two conf files are:-

# epkowa.conf
#
# examples for how to configure the SANE EPSON KOWA Backend
#
# SCSI scanner:
scsi EPSON
#
# Parallel port scanner:
#pio 0x278
#pio 0x378
#pio 0x3BC
#
# USB scanner - only enable this if you have an EPSON scanner. It could
#               otherwise block your non-EPSON scanner from being 
#               recognized.
usb /dev/usb/scanner0


# epson.conf
#
# here are some examples for how to configure the EPSON backend
#
# SCSI scanner:
scsi EPSON
#
# Parallel port scanner:
#pio 0x278
#pio 0x378
#pio 0x3BC
#
# USB scanner:
# There are two different methods of configuring a USB scanner: libusb and the 
kernel module
# For any system with libusb support (which is pretty much any recent Linux 
distribution) the
# following line is sufficient. This however assumes that the connected 
scanner (or to be more
# accurate, it's device ID) is known to the backend. 
#usb
# For libusb support for unknown scanners use the following command
# usb <product ID> <device ID>
# e.g.:
usb 0x04b8 0x0112
# And for the scanner module, use the following configuration:
usb /dev/usb/scanner0
#usb /dev/usb/scanner0

# Try USB printers -- this line is required (bug #122328)
#usb


What now happens if I switch on the scanner and start xsane, xsane thinks it 
has found a scanner. When I try to do a scan preview xsane gives me the error

Failed to start scanner: Error during device I/O

If I then shut down and restart xsane, it takes much longer to find the 
scanner, but then it works, so I think I'm nearly there.

Here are the the relevant lines from the system log:-

Feb 22 14:15:49 boss kernel: usb 1-1: xsane timed out on ep1in
Feb 22 14:15:49 boss kernel: usb 1-1: usbfs: USBDEVFS_BULK failed ep 0x81 len 
1 ret -110
Feb 22 14:18:47 boss kernel: usb 1-1: xsane timed out on ep1in
Feb 22 14:18:47 boss kernel: usb 1-1: usbfs: USBDEVFS_BULK failed ep 0x81 len 
1 ret -110

Thanks,

Dave Fletcher