I have exactly this problem in Karmic (up-to-date) with my wireless external keyboard (Logitech). I think there are keyboards that forget these settings when connection is lost. Sometimes this also occurs after a sleep-resume without unplugging the keyoard.
I have exactly this problem in Karmic (up-to-date) with my wireless external keyboard (Logitech). I think there are keyboards that forget these settings when connection is lost. Sometimes this also occurs after a sleep-resume without unplugging the keyoard.