The /usr/share/kudzu/pcitable at line 1845 has:
0x5333 0x8a13 "Server:SVGA" "S3 Inc.|86c368 [Trio 3D/2X]"
and if you change to:
0x5333 0x8a13 "Card:S3 Trio3D/2X" "S3 Inc.|86c368 [Trio 3D/2X]"
it works correctly - with the --preferxf4 option.
If the 'Server' is specified then Xconfigurator does not seem to look at
the 'Cards' file at all.
Changing this lines makes it work - what else may be using this file ?
This is part of kudzu...
Will be fixed in kudzu-0.79 when it gets released.