I had an old P4 (1.2 GHz) box that was running debian etch fine. Recently upgraded the motherboard to a duo core on a 945G chipset board. Now if I start windows-XP and put it in standby mode and then restart linux, linux becomes unusable with kacpid taking 100% cpu. Starting linux with kernel option acpi=off works and sometimes if it is restarted without the option it keeps working and sometimes not. Evidently windows standby leaves some state in the BIOS that linux cant clean up/detect. What?? The output of uname -vr is as follows: 2.6.22-2-686 #1 SMP Fri Aug 31 00:24:01 UTC 2007 Thanks Rustom Mody - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html