Hi, I got the impression that when you press a key that causes one of the keybord led to light up, the interrupt handler causes an interrupt within the interrupt he is handling. First: is that true? Second: if it is so can someone explain the matter to me so that I do not loose a lot of time rgrepping drivers/char to satisfy my curiosity? Thank. Ciao, Paolo. --- [rtl] --- To unsubscribe: echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED] ---- For more information on Real-Time Linux see: http://www.rtlinux.org/~rtlinux/