libGL.so forces all rendering to software. replacing libGL.so
with the binary from ftp.xfree86.org reenables hardware rendoring
(tested with FireGL addon driver)
This I believe is Mesa related. Mesa needs to be synced with XFree86 when
the next public build is made.
Mesa pipes requests through as usual - works for my Matrox and ATI chipsets.
The problem is probably caused by using a too old FireGL driver; this will be
fixed when Mesa is synced with XFree86 again (after the next X build).