Reboot your computer to your new kernel and login as a normal user. It's time to see if you have direct rendering and how good it is.

Code Listing 4.1: Testing rendering

$ startx

(No need to load modules for your driver or agpgart, even if you compiled them as a module.)

(They will be loaded automatically.)

$ glxinfo | grep rendering

direct rendering: Yes

(If it says "No", you don't have 3D acceleration.)

$ glxgears

(Test your frames per second (FPS) at the default size. The number should be )

(significantly higher than before installing x11-drm. Do this while the CPU is as idle as possible.)