Sorry about another thread about this but I have not seen a fix posted yet.
I am running Lucid standard Ubuntu on 1000HA with Intel GMA 950 graphics.
I periodically have keyboard and mouse freezes. It seems turning off visual effects decreases the frequency of the problem but does not solve it.
I turned on the keyboard map of control-alt-backspace and I am able to restart x when it freezes.
I am running kernel 2.6.32-22-generic which if I read things correctly includes fixes for x memory leaks.
thanks in advance