micromoog wrote:
> I managed to get it working last night . . . I enabled support for
> "ati" in the kernel (not sure whether this was necessary), then
> installed the daily build of the Mach 64 DRI from
> http://freedesktop.org/~dri/snapshots/.

That is essentially what I did.

Incidentally, adding the following line to "xorg.conf" added
an extra 100fps to glxgears performance:

Option "DMAMode" "async"

For some reason, this seems to indicate that "async" is the
default setting:

[http://www.retinalburn.net/linux/dri_status.html]

Option "DMAMode" "async" or "sync" or "mmio"
Use asynchronous DMA (default), synchronous DMA,
or PIO/MMIO to dispatch buffers.

Perhaps that refers to a different driver or driver version.

There are a few tweaking options on this page (Sec. 6):

http://www.gentoo.org/doc/en/dri-howto.xml

I don't know if they're relevant. I haven't tried them yet.

> Mach64 is NOT built by default when emerging x.org.

Apparently not! A Mach64 driver of some sort appears to be
included in the X11R6.8.0 release:

http://freedesktop.org/~xorg/X11R6.8...LNOTES3.html#9
http://freedesktop.org/~xorg/X11R6.8.0/doc/ati.html

What "included" means exactly, I cannot say. In addition, I'm
not completely certain that the implementation described offers
the full range of hardware acceleration features that will work
with the Mach64 card. I haven't had a look at the emerged xorg
source yet.

R.