There is a AGP-to-PCI bridge on a G450 PCI. The thing is that you have a
AGP chip on your PCI card , and the bridge is used to connect the chip
on a PCI bus. But I don't know why DRI only supports AGP cards, need to
investigate a little bit more. Did anyone have any cue on this?
Karl
MacGyver wrote:
>I tried asking on dri-users and didn't get any feedback, so as they say,
>go to the horse's mouth...
>
>I bought a Matrox G450 PCI card. It's important to note that this is
>the PCI version of the G450 and not the AGP card. Which is where the
>trouble begins...so I have X running, mostly...now I want to go to the
>next level and get DRI up and running. I'm running RedHat 7.1 (Linux
>2.4.3) and XFree86 4.0.3. I simply can't bring up DRI under
>X...according to the logs, the kernel modules aren't loading. My
>suspicion is that the problem is that the kernel modules don't recognize
>the G450 PCI. Has anyone else run into this? If so, what's the status
>on getting the PCI version of the G450 running under DRI? It seems that
>the way Matrox implemented the G450 is to embed an AGI-to-PCI bridge on
>the card itself, and Linux doesn't seem to cope well with it. But
>that's pure conjecture at the moment.
>
>When trying to modprobe the modules directly, I get notified that there
>are no AGP cards on my system, which isn't surprising seeing as I have
>no AGP slots. :) Interestingly, lspci -v reports:
>
>00:13.0 PCI bridge: Hint Corp: Unknown device 0021 (rev 12) (prog-if 00
>[Normal decode])
> Flags: bus master, medium devsel, latency 0
> Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
> Memory behind bridge: faf00000-fbffffff
> Prefetchable memory behind bridge:
>00000000f6e00000-00000000fae00000
> Capabilities: [80] Power Management version 2
> Capabilities: [90] #06 [0000]
> Capabilities: [a0] Vital Product Data
>
>01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G400 AGP
>(rev 82) (prog-if 00 [VGA])
> Subsystem: Matrox Graphics, Inc.: Unknown device 0d41
> Flags: bus master, medium devsel, latency 136, IRQ 11
> Memory at f8000000 (32-bit, prefetchable) [size=32M]
> Memory at fbffc000 (32-bit, non-prefetchable) [size=16K]
> Memory at fb000000 (32-bit, non-prefetchable) [size=8M]
> Expansion ROM at <unassigned> [disabled] [size=128K]
> Capabilities: [dc] Power Management version 2
> Capabilities: [f0] AGP version 2.0
>
>Which is what leads me to believe that there's an AGP-to-PCI bridge
>implemented on the card somehow.
>
>Any help or direction would be greatly appreciated,
>
>Mac
>
>
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