前段时间装了驱动进不到桌面，改回来之后再次尝试安装，可是那个安装说明实在是简单，我这个绝对新手照着做，每次都是失败。又找了一个介绍怎么启用XGL的，这个很详细，我弄成功了并且改了一下，发上来给大家参考一下。
P.S:可能是我的9550太不行了，系统提示说：Xgl已启用，但不能很好地与这张卡共用。要禁用 Xgl 并返回到 2D 桌面，请按下面的“禁用桌面效果”。这将使您注销并返回到登录屏幕。 不过好在学会了怎么开启XGL了。
1. 先将make、gcc、kernel-source、xgl、compiz全部安装好
2.到 下载对应你系统架构驱动。
3.在终端执行命令。下面是我执行的命令：
lovemai.kuraki@Aurea:~> ./ati-driver-installer-8.35.5-x86.x86_64.run
Created directory fglrx-install.T11528
Verifying archive integrity... All good.
Uncompressing ATI Proprietary Linux Driver-8.35.5
==================================================
ATI Technologies Linux Driver Installer/Packager
==================================================
Detected configuration:
Architecture: i686 (32-bit)
X Server: X.Org 6.9.x
Removing temporary directory: fglrx-install.T11528
lovemai.kuraki@Aurea:~> su
口令：
Aurea:/home/lovemai.kuraki # ./ati-driver-installer-8.35.5-x86.x86_64.run
Created directory fglrx-install.A13503
Verifying archive integrity... All good.
Uncompressing ATI Proprietary Linux Driver-8.35.5
==================================================
ATI Technologies Linux Driver Installer/Packager
==================================================
Detected configuration:
Architecture: i686 (32-bit)
X Server: X.Org 6.9.x
Removing temporary directory: fglrx-install.A13503
Aurea:/home/lovemai.kuraki # sax2 -r -m 0=fglrx
SaX: initializing please wait...
SaX: your current configuration will not be read in
SaX: access to your display has been granted
SPP: prepare device [0] profile: FireGL
SPP: including prepared profile(s)...
SaX: startup
SaX: X-Server: :0.0 -> grant
SaX: using cache data...
Aurea:/home/lovemai.kuraki #