toujours au même point après avoir modifié les fichiers etc/udev/rules.d/z60-libsane.rule
# Epson Stylus SX110
SYSFS{idVendor}=="04b8", SYSFS{idProduct}=="084d", MODE="0664", GROUP="scanner", ENV{libsane_matched}="yes"
dll.conf
[code]# /etc/sane.d/dll.conf - Configuration file for the SANE dynamic backend loader
On Debian systems, the dll backend will also look for pieces of configuration
in the /etc/sane.d/dll.d directory – packages providing backends should drop
a config file similar to dll.conf in this directory.
enable the next line if you want to allow access through the network:
net
epson
epson2
epkowa
[/code]
epkowa.conf
[code]#
usb
SEIKO EPSON’s USB vendor ID is ‘0x04b8’ (without quotes). In order
to find the USB product ID, use lsusb(1).
A sample configuration for the Epson Perfection 1650 (Epson GT-8200),
which has a product ID of 0x0110, would look as follows:
#usb 0x04b8 0x0110
usb /dev/usb/lp0
usb 0X04b8 0X084d
usb libusb:001:004
For SCSI devices not detected, you can add an entry like:
scsi EPSON GT-20000
where the GT-20000 bit corresponds to the SCSI model information as
shown in the output of dmesg(1) or in the /var/log/kern.log file.
Network attached devices may be made to work by first installing the
(non-free) iscan-network-nt package and then adding configuration lines
as per information below.
For each network attached device, you must add an entry as follows:
net <IP-address|hostname> [port-number]
Ask your network administrator for the device’s IP address or check
for yourself on the panel (if it has one). The port-number is very
optional and defaults to 1865.
Note that network attached devices are not queried unless configured
in this file.
Examples:
#net 192.16.136.2 1865
#net 10.0.0.1
#net scanner.mydomain.com[/code]
epson.conf
[code]# epson.conf
here are some examples for how to configure the EPSON backend
SCSI scanner:
scsi
for the GT-6500:
scsi “EPSON SC”
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.
For libusb support for unknown scanners use the following command
usb
e.g.:
usb 0x4b8 0x110
And for the scanner module, use the following configuration:
usb /dev/usb/lp0
usb 0X04b8 0X084d
usb libusb:001:004
[/code]
epson2.conf
[code]# epson2.conf
here are some examples for how to configure the EPSON2 backend
SCSI
scsi
for the GT-6500:
#scsi “EPSON SC”
Parallel port
#pio 0x278
#pio 0x378
#pio 0x3BC
USB
usb /dev/usb/lp0
usb 0X04b8 0X084d
usb libusb:001:004
For libusb support for unknown scanners use the following command
usb
e.g.:
usb 0x4b8 0x110
Network
net 192.168.1.123
net autodiscovery
[/code]
dans mon /dev/usb, je n’ai qu’un lp0 qui est mon imprimante mais pas de scanner 
mon scanimage -L donne
device `epkowa:usb:001:004' is a Epson Stylus NX110/SX110/TX110 Series flatbed scanner
device `epkowa:usb:001:004' is a Epson Stylus NX110/SX110/TX110 Series flatbed scanner
device `epson:libusb:001:004' is a Epson PID flatbed scanner
lsusb
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 004: ID 04b8:084d Seiko Epson Corp.
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
mon scanner est reconnu matériellement mais les logiciels de scan ne marchent ni en normal ni en root

bizarre bizarre quand même 
merci de votre aide
Totophe