It's an Epson CX5400, not a 400; sorry.

I got the printer working as a C82.
I can not get the scanner working.
Below is /etc/sane.d/epson.conf.
I've tried every combination I can think of.
The 'usb 0x4b8 0x808' is correct.
Used every usb slot there is.

I'm very frustrated.
Need help.

dlw

# epson.conf
#
# here are some examples for how to configure the EPSON backend
#
# SCSI scanner:
# scsi EPSON
# for the GT-6500, comment out the previous line and uncomment the following line:
#scsi
#
# Parallel port scanner:
#pio 0x278
#pio 0x378
#pio 0x3BC
#
# USB
# 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 0x4b8 0x808
# And for the scanner module, use the following configuration:
usb /dev/usbscanner0
usb /dev/usb/scanner0

What output do you get with sane-find-scanner and scanimage -L? Try it both as a regular user and as root.

Oh, and comment out the single "usb" line and the two scanner module lines. You shouldn't need them if you're using the regular usb drivers. You only need the one "usb 0x4b8 0x808" entry.

Changed /etc/sane.d/epson.conf as suggested. Did not help.

Below are the results of sane-find-scanner and scanimage -L

dlw

[root@desktop don]# sane-find-scanner

# sane-find-scanner will now attempt to detect your scanner. If the
# result is different from what you expected, first make sure your
# scanner is powered up and properly connected to your computer.

# No SCSI scanners found. If you expected something different, make sure that
# you have loaded a SCSI driver for your SCSI adapter.

# No USB scanners found. If you expected something different, make sure that
# you have loaded a driver for your USB host controller and have installed a
# kernel scanner module.

# Not checking for parallel port scanners.

# Most Scanners connected to the parallel port or other proprietary ports
# can't be detected by this program.
[root@desktop don]# scanimage -L

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).
[root@desktop don]# su - don
[don@desktop ~]$ sane-find-scanner

# sane-find-scanner will now attempt to detect your scanner. If the
# result is different from what you expected, first make sure your
# scanner is powered up and properly connected to your computer.

# No SCSI scanners found. If you expected something different, make sure that
# you have loaded a SCSI driver for your SCSI adapter.

# No USB scanners found. If you expected something different, make sure that
# you have loaded a driver for your USB host controller and have installed a
# kernel scanner module.

# Not checking for parallel port scanners.

# Most Scanners connected to the parallel port or other proprietary ports
# can't be detected by this program.

# You may want to run this program as root to find all devices. Once you
# found the scanner devices, be sure to adjust access permissions as
# necessary.
[don@desktop ~]$ scanimage -L

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).
[don@desktop ~]$

Something is keeping the system from finding your scanner well before sane comes into play. You should be getting a hit from sane-find-scanner, at least. That's getting beyond my expertise though.

Does lsusb show anything? It should output the manufacturer and hexidecimal model number if your system is detecting it.

lsusb as root shows nothing.

dlw