Problems starting X session with nouveau driver

I install Magiea5 in two computers,with the Nvdia GTX950/GTX960,but both of them can not boot to KDE4 launcher.The screen displays "nouveau EC..." all the time.
I search in the Internet,the reason is linux kernel 4.4 can not proside GTX950/GTX960.
If I close nouveau,can Mageia5 boot to launcher?
If so,could please to tell me how to close nouveau?
How can I use another linux(deepin) to close nouveau intalled in Mageia5?
I am a new linux user.
I search in the Internet,the reason is linux kernel 4.4 can not proside GTX950/GTX960.
If I close nouveau,can Mageia5 boot to launcher?
If so,could please to tell me how to close nouveau?
How can I use another linux(deepin) to close nouveau intalled in Mageia5?
I am a new linux user.