System becomes very slow after update to squeeze 6.0.1

[Jackie Wang <jackie2004.wang@gmail.com>]

Hi all,

My laptop is HP 6515b, AMD Turion 64x2 CPU, 2G memory with dual system,
Debian and windows XP. First time I installed Debian Lenny 5.0.4 amd64
on my laptop, DE is Gnome. Then upgrade to 5.0.6, then 6.0. Until 6.0 it
works very well. But recently after i updated to 6.0.1 the system
becomes very slow. I notice the process Xorg consume many CPU usage.
even i open a terminal window, it pop up very slow.today i fresh
installed my laptop,using netinst method
(debian-6.0.1a-amd64-netinst.iso).but after installed the system still
very slow, Xorg still consume many CPU. but windows XP runs normal, so i
think 6.0.1 has some problem. does anybody encountered this situation?

BTW,can i just install debian 6.0 not 6.0.1? i have 5.0.4 DVD and 6.0.1
netinst CD.

TIA

Jackie