See this post for up-to-date instructions: Setting up my Xerox WC3119.

Scanner part of Xerox WorkCentre 3119 is natively supported by SANE with xerox_mfp backend. I failed to make the proprietary UnifiedLinuxDriver work with my device and it turned out that it is not needed anymore.

Update: unfortunately, I forgot to create bugreport for these missing lines, so WC3119 is not supported out-of-box. Better late than never…

Moreover, with xerox_mfp the batch scan works properly while with Xerox/Samsung drivers it locked the scanner up.

In order to add udev support, the following lines need to be inserted to /lib/udev/rules.d/40-libsane.rules. This will adjust ACLs accordingly for the device, otherwise you will need to adjust file access modes on /dev/bus/usb manually.

# Xerox WorkCentre 3119 ATTRS{idVendor}=="0924", ATTRS{idProduct}=="4265",
ENV{libsane_matched}="yes"

/etc/sane.d/xerox_mfp.conf should have the following line appended in order for the backend to recognize the device:

#Xerox WorkCentre 3119.
usb 0x0924 0x4265

Tested on Ubuntu Karmic alpha 6.