I have been trying to fix this all day. When attempting to run glxgears:


Xlib: extension "GLX" missing on display ":0,0".
glxgears: Error: couldn't get an RGB, Double-buffered visual.


I have an nForce motherboard with integrated geforce 2 gpu and it is listed as supported under the driver readmes. I have tried different kernels and different nvidia drivers. I am on a Gentoo system. When i install nvidia drivers through "emerge" i remember to install nvidia-glx always. Every way i install the drivers i do it by the book word for word. I have read almost a hundred forums on the same subject and none solved my issue. Because i have been playing with gentoo, i have installed gentoo over 3 times on this system, each time differently, and every time i notice i still have no glx.

xorg.conf

-dri is commented

-load "glx" is there

-under graphic drivers. driver is "nvidia"


Please tell me the secret to this someone. its really irkin me.

Recently Nvidia split it's driver set; one for new cards and one for legacy devices(Which an original gforce would fall into). Is it possible that emerge is installing the wrong one?

hmmmm. That scenario could be possible but it still doesnt explain why the same thing happens with every version of driver on the archive site. in the xlog it almost looks as if it gives up on nvidia and/or goes to nv. I noticed something funky in my make.conf too. I tried to compile programs with support for both nv and nvidia only it looks like this:

VIDEO_CARDS="nv nvidia"

I think it may have compiled everything for nv. im gonna do a bare recompile and figure these things out.

my /etc/make.conf included

VIDEO_CARDS="nv nvidia"

I did this hoping it would compile for both but everything ended up compiling for nv only.

I am now running gentoo vanilla 2.6.11.11 sources with the latest driver from the nvidia.com site. NOT the emerge nvidia-kernel/glx these dont work on my machine for some reason. major freeze and bios damage, had to flash firmware to get my computer to boot up and give a beep. sometimes it would hang and do nothing. This is for all you nForce IGP users out there. I still wish the newer nforce boards contained IGP. Could you imagine an integrated 6800 when youve got 2 gig of ram for it to play with? oh yes!

Also check that u don't have Option "Composite" "Enable"
Because if u use xorg then glx won't work if u use Composite.
So if u got it in your xorg.conf put an # infront of it.
Why Composite and glx won't work at the same time is because there's no code for it.
Also check the permissions.
This will fix the permissions.
chmod 0666 /dev/nvidia*
chown root /dev/nvidia*

And about the 'driver split' if your card is an mx one it should still be supported by the new drivers.
Now i hope this helps.