[ACPI] Supermicro P8SC8 won't power off

[mmadore <mm...@bl...>]

Hi,

I have a Supermicro P8SC8 motherboard that won't poweroff with ACPI using the 2.4 kernel series.  I have testing it with 2.4.25, 2.4.27, 2.4.28 and 2.4.29-pre2.  In all cases, the system enters acpi_enter_sleep_state after which, the keyboard leds flash once and the screen goes blank.  The system remains in this state with the power still on.  If I try to reboot the system via the reset switch, the machine never POSTS.  I have to remove and re-insert the power cord to boot the system again.

With 2.6.9, the machine powers off as expected.  Can anyone offer any advice on how to debug this problem?

Thanks

Mike