AMD 760MP, only AGP 2X

[rmtnez]

After recompiling nvidia driver 1.0-4191, I can not get AGP 4X working.

The data are:

[root@lambada root]# cat /proc/driver/nvidia/agp/*
Fast Writes: Supported
SBA: Supported
AGP Rates: 4x 2x 1x
Registers: 0x1f000217:0x0f000102
Host Bridge: AMD 760MP
Fast Writes: Not Supported
SBA: Supported
AGP Rates: 2x 1x
Registers: 0x0f000203:0x00000102
Status: Enabled
Driver: NVIDIA
AGP Rate: 2x
Fast Writes: Disabled
SBA: Disabled


Please, help ...
Thanks in advance,
Rafa.

[bwkaz]

Your chipset is reporting to the driver that it doesn't support anything higher than 2x mode.

Are you positive that 4x is enabled in your BIOS?

Does using agpgart work any better?

[Wolfman [TWP]]

Check your BIOS to see if it's set to 4x. I'm running a 760MP chipset mother board and I've got it to run in 4x mode.

# cat /proc/driver/nvidia/agp/*
Fast Writes: Supported
SBA: Supported
AGP Rates: 4x 2x 1x
Registers: 0x1f000217:0x0f000314
Host Bridge: AMD 760MP
Fast Writes: Supported
SBA: Supported
AGP Rates: 4x 2x 1x
Registers: 0x0f000217:0x00000314
Status: Enabled
Driver: NVIDIA
AGP Rate: 4x
Fast Writes: Enabled
SBA: Enabled

[rmtnez]

BIOS AGP mode is set to 4X

[Wolfman [TWP]]

Which Mother board and video card are you running??

[rmtnez]

I use a Dual AMD A7M266-D and a GeForce4 Ti 4600

[Wolfman [TWP]]

Ah so it's an ASUS board...

I've got pretty much the same setup, except my mother board is a Tyan Tiger MPX, and a MSI GF4 Ti4600 video card.

The only thing I could suggest, is to see if ASUS have a BIOS update.. And try that..

[warer]

warer root # cat /proc/driver/nvidia/agp/*
Fast Writes: Supported
SBA: Supported
AGP Rates: 4x 2x 1x
Registers: 0x1f000217:0x0f000104
Host Bridge: AMD 760MP
Fast Writes: Supported
SBA: Supported
AGP Rates: 4x 2x 1x
Registers: 0x0f000217:0x00000104
Status: Enabled
Driver: AGPGART
AGP Rate: 4x
Fast Writes: Disabled
SBA: Disabled

As you can see i get AGP 4x using agoart in the kernel, are you?
MSI ti4400 card

[michael]

seems like I am having similar problems :

wolfman could you post your config

eg. XF86Config

Next thing I gonna try is a bios upgrade from asus. Maybe it helps.

Regards

Michael

[Wolfman [TWP]]

Michael:

As you can see from my post above (Showing my agp stats), that I'm able to enable all the features of the Mbrd and Video card. Remembering of course that I use a Tyan Tiger MPX mother board and MSI GF4 Ti4600 video card. I'll post you my XF86Config file details as soon as I get home tonight.. (I'm currently at work, and have no access to the system)

I seem pretty sure that the problems you guy's are having will be BIOS related, or could even be a mother board design flaw. (MSI Dual Athlon boards have similar problems, and I also have one of them too. But this issue doesn't happen with the Tyan)

[michael]

*urgs* pls not. I bougth this one because of my good experiences with ASUS Dual Boards. Anyway _currently_ I am at work and preparing the stuff necc. for an bios upgrade.

:-) My home box runs linux exclusivly and I dont even have a bootable dos-disk.

Kind regards

Michael

[Wolfman [TWP]]

Ok, here are the extracts from both my XF86Config file and /etc/modules.conf. You will need both files to be edited to get it to work.

You will need these two lines in your 'modules.conf' file.

alias char-major-195 nvidia
options nvidia NVreg_EnableAGPFW=1 NVreg_EnableAGPSBA=1 NVreg_SyncCrtcs=0

And this is how I setup the entries in my 'XF86Config' file.

Section "Device"
# No known options
#
# "1" Enable NVAGP Support
# "2" Enable AGPGART Support
# "3" Try AGPGART else NVAGP
# BusID
Identifier "NVIDIA GeForce 4 (generic)"
Driver "nvidia"
VendorName "NVIDIA GeForce 4 (generic)"
BoardName "NVIDIA GeForce 4 (generic)"
VideoRam 131072
Option "NvAGP" "1"
Option "DigitalVibrance" "2"
Option "CursorShadow" "1"
Option "RenderAccel" "true"
EndSection

The side band addressing section you won't need, as it will not increase the performance. I just left it in for the hell of it. (Basically to test to see if it does any better, which it doesn't)

[rmtnez]

The card I used was a Creative GF4 Ti4600. I've replaced it by a ASUS Ti4600 and inmediately got AGP 4X.

So the problem is in the card or in the board BIOS that it is not able to detect the 4X capabilities of the Creative.

Is there anyway to obtain a new bios for the creative?

[bwkaz]

I'd look around on Creative's web site, personally. But that's just me. ;)

[michael]

:-)

Fast Writes: Supported
SBA: Supported
AGP Rates: 4x 2x 1x
Registers: 0x1f000217:0x0f000304
Host Bridge: AMD 760MP
Fast Writes: Not Supported
SBA: Supported
AGP Rates: 4x 2x 1x
Registers: 0x0f000207:0x00000304
Status: Enabled
Driver: AGPGART
AGP Rate: 4x
Fast Writes: Disabled
SBA: Enabled

Upgrading the ASUS Bios to Version 1009 + Wolfmanns Settings in /etc/modules.conf

options nvidia NVreg_EnableAGPFW=1 NVreg_EnableAGPSBA=1 NVreg_SyncCrtcs=0

+

mem=nopentium acpi=off as boot parameters

_worked_ YES !

Thx for the help

Michael


BTW. The performance rocks

[Wolfman [TWP]]

To get Fast Writes to work, you need to enable it in the BIOS. I found it does add a little more performance to the config.

And try to use the NVAGP driver and not the kernel one (AGPGART). As the NVidia driver better supports the video cards features and performance.. (See my XF86Config file settings above on how to do that)

[michael]

Hi,

switching from AGPgart to NVAGP + activating the renderAccel option in XF86Config causes problems. X11 runs a couple of minutes and then crashes unexpected. I do not know which one is the bad guy but I am going to check this in the evening.

Regards

Michael

[Wolfman [TWP]]

The renderAccel option isn't really needed. I haven't noticed any difference with it enabled or not. So might as well remove it.

But I noticed that using the NvAGP option, seemed to make the system more stable, and I also noticed a small performance increase. This may work ok on my system, but it may not on yours. (You will have to experiment with the settings to see which one works for your system)

[michael]

Hi there,

I have tried NVAGP but using this module causes frequent crashes. I can live with the performance of agpgart. Anyway I havent noticed any differences. Btw. is there a tool availabe to test the 3d performanc ?

Michael

[Wolfman [TWP]]

Apart from running a 3D OpenGL game, you can run glxgears. That will give you an approximate idea of the 3D performance..