ishitori's blog

this is how I made it work in gentoo.

1) install iscan

current version of iscan is 2.21.0 but the point is that it doesn't include proprietary firmware - just like the previous version available in portage (2.11.0) did.
that is why add iscan-2.11.0 to package.keywords (it's ~x86 now):

# echo =media-gfx/iscan-2.11.0 ~x86 >> /etc/portage/package.keywords

and mask iscan-2.21.0 manually:

# echo =media-gfx/iscan-2.21.0 >> /etc/portage/package.mask

iscan depends on sane-backends but I don't need all the backends available that is why I added the following line in make.conf:

# echo SANE_BACKENDS="" >> /etc/make.conf

it also allows to keep your /etc/sane.d directory clean

2) configure backend

make sure that the only line left uncommented in /etc/sane.d/dll.conf is

epkowa

and the only uncommented line in /etc/sane.d/epkowa.conf is

usb

scanner model is known to the backend - you shouldn't specify usb vendor and product id with usb 0x04b8 0x012d.

3) allow to scan under normal user

to scan under normal user username should be added to scanner and usb groups.

also make sure that file /etc/hotplug/usb/libsane.usermap contains lines for your scanner:

# EPSON GT-F650 | EPSON GT-S600 | EPSON Perfection V10 | EPSON Perfection V100 Photo
libusbscanner 0x0003 0x04b8 0x012d 0x0000 0x0000 0x00 0x00 0x00 0x00 0x00 0x00 0x00000000

4) test scanner

finally test the scanner (under root) as described in all wikis:

# sane-find-scanner

it should output:

...
found USB scanner (vendor=0x04b8 [EPSON], product=0x012d [EPSON Scanner]) at libusb:001:002
...

now issue command to list available devices:

# scanimage -L

your scanner at this moment should make a noise and the command output would be:

device `epkowa:libusb:001:002' is a Epson Perfection V10/V100 flatbed scanner

if the last command is successful your scanner is ready for work.

5) install xsane

finally install xsane (I don't like iscan) and launch it under normal user:

$ xsane