acer 630 weird mouse behavior & keyboard freeze

["Giuseppe Ciotta" <giuppi@acaro.org>]

hi! i have an acer 630 laptop, using it, sometimes (today happened 4 times) 
the mouse cursor do weird movements on the screen and the keyboard is 
unusable, the only solution is to kill XFree and restart it, and i lost all 
of my unsaved work :( 

what could it be ? 

i use a 2.4.21-pre3 + acpi kernel (but i had the same problem with 2.4.20 + 
acpi) 

any ideas ? this really makes me impossible to work!