I'm using internal VGA these days and I've got a problem:I can't run any games.I always get this errors:--------- [Loading Renderer] ---------Initializing OpenGL display...setting fullscreen mode 3: 1024 768Using XFree86-VidModeExtension Version 2.2Xlib:  extension GLX missing on display :0.0.Error couldn't get an RGB, Double-buffered, Depth visual, Stencil BufferedXlib:  extension GLX missing on display :0.0.Error couldn't get an RGB, Double-buffered, Depth visualref_gl::R_SetMode() - invalid modeInitializing OpenGL display...setting mode 3: 1024 768Using XFree86-VidModeExtension Version 2.2Xlib:  extension GLX missing on display :0.0.Error couldn't get an RGB, Double-buffered, Depth visual, Stencil BufferedXlib:  extension GLX missing on display :0.0.Error couldn't get an RGB, Double-buffered, Depth visualref_gl::R_SetMode() - could not revert to safe moderef_gl::R_Init() - could not R_SetMode()My motherboard is K8S-MX and I'm using linux 10.04Do you know how can I fix it? 
Why am I getting a Cannot revert to safe mode error whenever I try to run a game?
linux;ubuntu
What is the Vendor of your graphics card? It looks like you might not be using the right (or optimized) driver for it.You can install mesa-utils and run glxinfo to get more details about the GLX extension on your machine, but since you seem to be using Ubuntu I'd suggest using the Additional Drivers thingy that you can find under System->Administration->Additional Drivers  to try to let Ubuntu figure out whether you do for example need a binary driver for your card.