Lost my mouse and agpgrat after a reset

[yasker <yasker@gmail.com>]

Hi, all

I forced to reset after my KDE freeze. Then I found I can't open X after reset.

It said that /dev/input/mice and /dev/agpgrat is not found. I used "cat /dev/input/mice" and "cat /dev/agpgrat" also get no result. It seems these things get lost. 

I don't know how to deal with it. If I must reinstall KDE or xorg?  Or is there a simple way to solve this?

Everything goes well in my Windows. So there is no hardware error. 

Please help me.

Thanks.

-- 
regards, 
Yang Sheng