I have a problem with my mouse and network but I have no clue what cause that.

System:MotherBoard: Tyan Thunder K8WE (S2895). Logitech USB mouse

Sympton: the corsor of USB mouse dispear and network loses the connection.
It definately happened when I do the FTP but it could happen on other
situation as well. When the mouse dead, the keyboard is still working.
The file system seems to be fine. I can delete or copy file without any
problem. I can still ping the network but it isn't conects to any other
computer. The return of ifconfig and route command looks fine but it take
longer to get return with route. The /etc/init.d/network shows fine. The
/etc/init.d/network restart won't get the network back. Any reboot, X
window restart(Ctrl+Alt+Backspace), init runlever will make the system halt
and only disconnect the power can save it. I can find anything in the
system log besides this following line.
kernel: JBD: barrier-based sync failed on dm-0 - disabling barriers

I really appreciate any input.