精简了一下：
Code:
USE_GLX=yes
2、编译内核，改动如下
Code:
# Direct Rendering modules for 3D acceleration.
device drm # DRM core module required by DRM drivers
device radeondrm # ATI Radeon
3、安装dri
Code:
portinstall dri
Code:
Section "Module"
Load "dri"
Load "glx"
EndSection
Section "Device"
Driver "radeon"
EndSection
Section "DRI"
Mode 0666
EndSection
这么做后glxinfo报错，但从跑tuxracer看3d肯定打开了。
