[kubuntu] X looses keystrokes, terminal not affected.

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http://ubuntuforums.org – Hi, I intalled Kubuntu Hardy on the laptop of my girlfriend, but the keyboard makes problems. It seems that X sometimes misses keydown- and keyup-events. So sometimes typed letters don't show and sometimes a typed letter repeats very often until I press it again (or another key). This bug makes it hard to get work done. This problem occurs only in X, not on the terminl. I tried it an I'm sure. I also did the following: Opened Konsole and did "sudo cat /dev/input/event1" (which is the keyboard). I ran this in the background while typing on X, and I could see that the keystrokes where detected, but they didn't show on kate. Is there a way to solve this or some kind of workaround? Thanks for your help. (Hardware)