Arch Linux

EAD

Member

Registered: 2006-03-11

Posts: 255

Nvidia and fast writes

Hii, it seem then when running the sysinfo tool, the Fast writes on my nvidia is disable.
when running
cat /proc/driver/nvidia/agp/card
and
cat /proc/driver/nvidia/agp/host-bridge
it does say that my card support this mode, I have tried adding to my Xorg.conf the line under section "device"
Option         "AGPFastWrite" "true"
and still nada, Can some one please help me out here?
:?:

Neuro

Member

From: Poland

Registered: 2005-10-12

Posts: 352

Re: Nvidia and fast writes

Try adding this to your /etc/modprobe.conf

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

Works for me:

[neuro@wintermute:~] cat /proc/driver/nvidia/agp/status
Status:          Enabled
Driver:          AGPGART
AGP Rate:        8x
Fast Writes:     Enabled
SBA:             Enabled

Edit: Oh, and this requires reinserting the module. So either reboot or

init 3
modprobe -r nvidia
init 5

EAD

Member

Registered: 2006-03-11

Posts: 255

Re: Nvidia and fast writes

Tanx!!!
Works great, why isn't it the deafult?

Neuro

Member

From: Poland

Registered: 2005-10-12

Posts: 352

Re: Nvidia and fast writes

Tanx!!!
Works great, why isn't it the deafult?

Because it's hardware-specific. Take a look here:

cat /proc/driver/nvidia/agp/host-bridge
Host Bridge:     PCI device 1106:3189
Fast Writes:     Supported
SBA:             Supported
AGP Rates:       8x 4x
Registers:       0x1f000a1b:0x00000b12

Not everyone has these pretty supported flags on

Cam

Member

From: Brisbane, Aus

Registered: 2004-12-21

Posts: 658

Website

Re: Nvidia and fast writes

Because not everyone has an nvidia card...

---

DON'T CLICK THIS

EAD

Member

Registered: 2006-03-11

Posts: 255

Re: Nvidia and fast writes

Yes I know not everyone have these, but every one with Nvidia new card has it:)
Any way, How did you know it? (adding these lines to modprobe)
Where can I read about it?
:?:

rpgcyco

Member

From: Australia

Registered: 2005-09-27

Posts: 74

Re: Nvidia and fast writes

I remember reading quite a few times on nvnews.net that having Fast Writes enabled can potentially cause instability.

- Rpg Cyco

Neuro

Member

From: Poland

Registered: 2005-10-12

Posts: 352

Re: Nvidia and fast writes

Yes I know not everyone have these, but every one with Nvidia new card has it:)
Any way, How did you know it? (adding these lines to modprobe)
Where can I read about it?
:?:

I've done it waay-back on my previous Slackware installation. modinfo nvidia gave me a hint how to do it. Now, there are guides for it:
http://doc.gwos.org/index.php/Nvidia_Dr … Addressing

I remember reading quite a few times on nvnews.net that having Fast Writes enabled can potentially cause instability.

It all depends on your specific hardware. I've never had problems with it.

EAD

Member

Registered: 2006-03-11

Posts: 255

Re: Nvidia and fast writes

Tanx guys!
I love getting more info, great pages and woo, I am stupid, it is all written in "modinfo nvidia"
Tanx again

jaboua

Member

Registered: 2005-11-05

Posts: 634

Re: Nvidia and fast writes

Yes I know not everyone have these, but every one with Nvidia new card has it:)

Nope, I got an nvidia geforce 2 mx - it supports SBA, but not fastwrites.

Got to try SBA though, never tried it before.

Cotton

Member

From: Cornwall, UK

Registered: 2004-09-17

Posts: 568

Re: Nvidia and fast writes

EAD, how much of a difference did this make?

EAD

Member

Registered: 2006-03-11

Posts: 255

Re: Nvidia and fast writes

amm, it gives me some more FPS on some OpenGL.
beside, why not using a good thing if I can?