i am sorry i haven't got my SCIM right for typing chinese...(new bee here)

i've downloaded the NVIDIA official driver on its website for linux, but unable to install....

the installer tells me to shut X window firstly to continue, i've tried many ways in ubuntu to shut X, but none successful...
if i change runlevel to 2 or 1 , x window is shutted down but the installer need runlevel 3 to install. every time i switch to runlevel 3, the x window will be loaded automatically...( because it's UBUNTU? )

a NB person told me to change the default setting of boot up in the /etc/inittab file. but it does not even exist in ubuntu.......

finally, i installed a glx driver from apt-get, but it cannot work: the x window cannot start......
so i removed the glx driver and before restart, run the nvidia installer...bingo.......

i have to say this is too wiered... have the nvidia driver be installed in this way?

may somebody help me answer the question. Thanks a lot.
That feels awful for not knowing what's happenning...

果然是好办法，但是为什么ubuntu就和别的系统要搞得不一样，明明可以修改runlevel.

还有一个办法就是修改X 的xdm，但是忘具体怎么的了，哪位告诉一声？