There are currently problems with the server when used in conjunction with xdm, olvwm, and VT switching under Linux.
If the cursor changes while you're in a VT, the cursor won't look right when you return from the VT until it is moved between windows (and changes color and shape).
Memory probing does not work. You will need to explicitly specify the
amount of memory you have. If you have a 1 MB card, try put
VideoRAM 1024 into the Device section of your
XF86Config file. If this doesn't work, try adding
Option "vram_128" to the Device section.