Help with DRM / DRI on Matrox G400

[Paul Mackinney <pmackinney@speakeasy.net>]

I've got a Matrox Millenium G400, and recently installed a DVDROM drive.
Unfortunately, Xine drops too many frames to really watch anything
(mpeg & avi files play fine).

I've been trying to tweak my video performance, and notice the following
errors in my X log:

(==) MGA(1): Write-combining range (0xe6000000,0x1000000)
(II) MGA(1): vgaHWGetIOBase: hwp->IOBase is 0x03d0, hwp->PIOOffset is 0x0000
(--) MGA(1): 16 DWORD fifo
(==) MGA(1): Default visual is TrueColor
(II) MGA(1): [drm] bpp: 32 depth: 24
(II) MGA(1): [drm] Sarea 2200+664: 2864
drmOpenDevice: minor is 0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: Open failed
drmOpenDevice: minor is 0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: Open failed
[drm] failed to load kernel module "mga"
(II) MGA(1): [drm] drmOpen failed
(EE) MGA(1): [drm] DRIScreenInit failed.  Disabling DRI.

Can anyone shed light on this? I'm not running devfs, don't know if
'/dev/dri/card0' is really supposed to be there or how it would get
installed. I'm running Sarge, update regularly. Any advice appreciated.

Regards,

PM
-- 
Paul Mackinney
paul@mackinney.net