Some OSD information showed in screen!

I run SuSE 10 Beta4 in my ASUS A6Q17Va laptop with KDE,my screen often show some information about "LCD is on" or " LCD is off" like OSD,I want to know which program produced that. I try other WM,but other WM is not like that,so it is possible that this phenomenon produced by some program of KDE. This phenomenon was often displayed in my screen,annoyed！ How can stop it! Thanks!