http://bugs.winehq.org/show_bug.cgi?id=9408
--- Comment #6 from Jeremy White jwhite@codeweavers.com 2009-02-25 14:21:36 ---
I'm using the sane test backend on Hardy, which defaults to 2 test scanners. The test scanners work with xsane.
It sure looks like libsane either isn't loaded, or isn't finding any devices. Can you post a +twain log? Also, can you turn on sane debugging (export SANE_DEBUG_XXX=255, where XXX is your backend name, in caps) and see if that reveals anything?