XFree86 on Powerbook G3 Series

["Christoph Richardet - Mac Sys. Admin IIS ETHZ" <richar@iis.ee.ethz.ch>]

Every time I try to start the Xserver it aborts with the following message:

(**) FBDev: Using XF86Config video mode database
(--) FBDev: Removing mode "640x480" from list of valid modes.
(--) FBDev: Removing mode "800x600" from list of valid modes.

Fatal server error:
No valid modes found.


What's going wrong? Where is the video mode database located and how can I
fix the problem?

Chris

PS: I'm using the debian-potato Distribution with Xfree 3.3.6