X 4.0.3 and agpgart

[Jim McCloskey <mcclosk@ling.ucsc.edu>]

I recently up-graded to X 4.0.3 as part of the upgade to debian
testing. Also kernel version 2.4.5. There were some things to sort
out, but all seems basically well at this point.

There's one glitch, though, that I'm still trying to resolve. I have a
Matrox G400 card and I'm using the mga driver.

In the XFree86 log, I get this:

(II) MGA(0): [drm] bpp: 16 depth: 16
(II) MGA(0): [drm] Sarea 2196+632: 2828
[drm] failed to load kernel module "mga"
(0): [drm] drmOpen failed
(EE) MGA(0): [drm] DRIScreenInit Failed

and in syslog:

Jul 18 12:19:17 toraigh kernel: [drm] The mga drm module requires the
                                agpgart module to function correctly 
Jul 18 12:19:17 toraigh kernel: Please load the agpgart module before
                                you load the mga module 

So mga_drm requires the agpgart kernel module.  I have this module in:
/lib/modules/2.4.5/kernel/drivers/char/agp/

The device file exists:

 crw-rw----    1 root     video     10, 175 Jul 18 12:22 agpgart

But all attempts to load the module fail, with this on the
command-line:

 init_module: No such device

and this in sys.log:

 kernel: Linux agpgart interface v0.99 (c) Jeff Hartmann
 kernel: agpgart: Maximum main memory to use for agp memory: 94M
 kernel: agpgart: unsupported bridge
 kernel: agpgart: no supported devices found.

lspci shows:

 00:00.0 Host bridge: VIA Technologies, Inc.: Unknown device 0391 (rev 02)
 00:01.0 PCI bridge: VIA Technologies, Inc.: Unknown device 8391
 00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super] (rev 22)

So I tried:

 modprobe agpgart agp_try_unsupported=1

but got the same error messages. Anyone know of a way forward? Thanks,

Jim