[lug] RE: Nvidia accelerated divers

Jeff Howell howeljs at grimoire.stortek.com
Fri Nov 9 15:46:46 MST 2001

Actually that line in the XF86Config-4 file is telling X which agp
driver to use. As agpgart is loaded as a module, you're using the kernel
agp driver which is slowing your 3d performance a lot. The nvidia agp
driver won't show up as a kernel module. It's internal to the driver. I
would suggest using it unless you have a motherboard chipset that is
listed in the nvidia docs as incompatible with thir driver.

An excellent document for their drivers is here:

On Fri, 2001-11-09 at 13:41, D. Stimits wrote:
> One thing I've noticed is that XFree86 4.0.3 is much more stable than
> 4.0.2, and that newer NVidia drivers are also far more stable than old
> ones. I use an original GeForce I (but DDR). The 4.0.3 has a lot to do
> with SMP cleanups (I use SMP). The one thing that I found was the real
> show stopper is that I had to use the NVidia agpgart, and I had to
> specify 2x AGP, not 4x. The 4x was a problem. But considering I've had
> 640x480 24/32 bit programs exceeding 300 frames per sec, I don't think
> it is a problem. To specify 2x AGP with NVidia, within
> /etc/X11/XF86Config-4, find Section "Device" for the nVidia hardware,
> and add this (but be sure you are set to boot to console mode in case it
> doesn't go right...you can escape from a respawning X11 server, but it
> takes good timing):
>   Option "NvAgp" "2"
> Mine reads:
> Section "Device"
>    Identifier "nVidia Corporation|GeForce 256 DDR"
>    Driver "nvidia"
>    BoardName "Unknown"
>    Option "NvAgp" "2"
> EndSection
> And under lsmod I see these:
> agpgart                14816   3  (autoclean)
> NVdriver              659584  15  (autoclean)
> (though I'm not positive, I do think probably the agpgart is the NVidia
> version)
> With the 2x AGP, I find it is difficult to crash X11 under OpenGL
> (though I did recently come across a strange case that required
> rearranging the order of setting up an OpenGL window...glClearColor()
> had to be changed to a different location).

 Jeff Howell
 EDS Unix Support

  Linux Slackware: The Ultimate NT Service Pack

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