Please report bugs to: ppe@mpe.mpg.de The following information would be helpful: 1) Program output with debugging turned on including the command line used to run apmsleep. 2) Make & model of computer. 3) Linux version used. 4) /proc/apm 5) /proc/rtc 6) /proc/interrupts Please write, if you find that my program works on non-intel platforms as well. Peter Englmaier.