You cannot sync to anything but Qtopia Desktop on Linux. If you are using SL-5500 ROM 3.x or a SL-5600, then you cannot sync (under the Sharp/Sharp based ROMs) at all to Linux. OZ/Opie syncs to Qtopia Desktop, but still does not sync to Evolution or anything else (SL-5500 version is fairly stable, from what I hear, but the 5600 version is very unstable, and has big glitches, so far, from personal experience).