[MPlayer-users] Help setting MTRR

[Jason Tackaberry]

On Mon, 2006-11-27 at 08:51 -0800, Philip Walden wrote:
> 01:05.0 VGA compatible controller: nVidia Corporation NV5 [RIVA 
> TNT2/TNT2 Pro] (rev 15) (prog-if 00 [VGA])
>         Subsystem: ASUSTeK Computer Inc. AGP-V3800 SDRAM
>         Flags: bus master, 66MHz, medium devsel, latency 40, IRQ 11
>         Memory at f5000000 (32-bit, non-prefetchable) [size=16M]
>         Memory at fc000000 (32-bit, prefetchable) [size=32M]
>         Capabilities: [60] Power Management version 1
>         Capabilities: [44] AGP version 2.0
[...]
>  From what I read in most HowTos, I should set it as below, but what 
> about that other 32MB memory region? One HowTos I saw says to use the 
> last memory address?
> 
> echo "base=0xf5000000 size=0x1000000 type=write-combining" >| /proc/mtrr

Use 0xfc000000, as this is the prefetchable region.

echo "base=0xfc000000 size=0x2000000 type=write-combining" >| /proc/mtrr

If there are problems, dmesg should give you some hints.

Cheers,
Jason.