Enemy Territory being extremely lagging

[Dr. Z2A]

I am having a problem when trying to running Enemy Territory. Originally I was clicking on the icon and my screen just flashed and the game did not start, then I started it from command line and it said

***********************************************************
You are using software Mesa (no hardware acceleration)!
Driver DLL used: libGL.so.1
If this is intentional, add
"+set r_allowSoftwareGL 1"
to the command line when starting the game.
***********************************************************
...WARNING: could not set the given mode (4)
Initializing OpenGL display
...setting mode 3: 640 480
Using XFree86-VidModeExtension Version 2.2
XF86DGA Mouse (Version 2.0) initialized
XFree86-VidModeExtension Activated at 640x480
Received signal 11, exiting...

So I typed in "et +set r_allowSoftwareGL 1" and the game started up. But the game was so laggy from even the starting screen when I wasn't on the net for a game that it is pretty much impossible to get a good game in. This perplexes me a lot because this same computer ran Half Life 2 very fast back when it ran Windows XP. I'm pretty sure it has something to do with the "+set r_allowSoftwareGL 1". Does anyone know what I could do to make the game run quickly enough?

[jrz]

You need GLX, so you need a card that has drivers for it. Read whichever of these applies to you:
http://www.gentoo.org/doc/en/ati-faq.xml
http://www.gentoo.org/doc/en/nvidia-guide.xml