Hi all,

I've installed Slackware 12 on my new PC but it won't shutdown when I issue the "poweroff" command. The machine gets to the System halted stage, but won't actually power off. I have to boot my system with the boot parameter "acpi=off" as my system refuses to boot otherwise, and I've tried adding the parameter "apm=realmode_power_off". This seems to power the hard disk down but does not power off the machine. I can reboot the machine fine. I am running a custom built 2.6.20 kernel, but I have not altered the power management options from standard.

Does anyone know how I can fix this problem?

Thanks,

Steve

I think this is not possible to automatically power off your machine without ACPI.

If you don't have APCI or APM support (because your machine locks up with it enabled) then you can't automatically power off.

Did you see if there are patches or options that get APCI working on your specific motherboard?