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thom_raindog

Member

Registered: 2008-04-29

Posts: 175

[solved]Nvidia and fastwrite

Howdie,

I am trying to squeeze the last little bit of performance out of my old machine (LotrO going Free-to-play, and all ) and I have tried to get fastwrite to turn on. This is the state of this by now:

cat /proc/driver/nvidia/agp/host-bridge 
Host Bridge:     PCI device 1106:0314
Fast Writes:     Supported
SBA:             Supported
AGP Rates:       8x 4x 
Registers:       0x07000a1b:0x00000b02

cat /proc/driver/nvidia/agp/status 
Status:          Enabled
Driver:          AGPGART
AGP Rate:        8x
Fast Writes:     Disabled
SBA:             Enabled

So FW is available and supported (I knew that, turned it on in the Bios after all ) but it's not enabled.
Now, what I DON'T know is how to enable it. I could find nothing in the forum nor wiki here.
Any takers?

(BTW, no I am not 100% sure that FW will help my performance any, but I will find out )

Last edited by thom_raindog (2010-08-11 15:02:21)

broch

Banned

From: L.A. California

Registered: 2006-11-13

Posts: 975

Re: [solved]Nvidia and fastwrite

add
NVreg_EnableAGPFW=1
to modprobe.conf

hope this will help

thom_raindog

Member

Registered: 2008-04-29

Posts: 175

Re: [solved]Nvidia and fastwrite

Nope, that only threw a few errors on boot that the wrong line in /etc/modprobe.d/modprobe.conf will be ignored.

thom_raindog

Member

Registered: 2008-04-29

Posts: 175

Re: [solved]Nvidia and fastwrite

Ha, but you guided me in the right direction and now I could use something I found in an old post of mine when I still used Kubuntu and that did that trick:
Add

alias char-major-195-* nvidia
options nvidia NVreg_EnableAGPSBA=1 NVreg_EnableAGPFW=1

to /etc/modprobe.d/modprobe.conf and you're good

Thank you.

broch

Banned

From: L.A. California

Registered: 2006-11-13

Posts: 975

Re: [solved]Nvidia and fastwrite

hmm..
my mistake, I assumed that it is obvious that you will need to add whole statement to modprobe.conf not only option that enables FW.
I used this option very long time ago
however you don't need NVreg_EnableAGPSBA=1
because this is turned by default and you have SBA enabled

anyway, glad that it works