Re: minimum APM kernel settings to shut off power?

[Vincent Smeets <V.Smeets@T-Online.de>]

Hallo,

This is going to be some kind of FAQ.

I had the same problem. No combination of settings for AMP were working 
and ACPI wasn't loaded (Sarge) at startup.

I noticed at the start of dmesg some reports about that my BIOS was too 
old (1999 < 2001). That was the reason that ACPI wasn't loaded.

After adding the kernel parameter "acpi=force", the module was loaded 
and working. Now my computer is powered off correctly. That is the only 
change I had to made.

Regards,
Vincent

Florian Kulzer wrote:
> On Tue, May 02, 2006 at 19:25:38 +0200, lee wrote:
>
> > Hi,
> >
> > there are lots of options related to power management in the kernel
> > config, some/most/all of them seem the be mostly useful for laptops.
> >
> > The only power management feature I would like to have is turning off
> > the power on shutdown/halt. What are the minimum options I have to set
> > in the kernel (2.6.16-2) config to get only that?
>
>
> Having the apm module should be enough (unless you want to use ACPI).
> You might have to modprobe it manually or add it to /etc/modules. If
> your power-off does not work, check with "lsmod | grep apm" if the
> module is really loaded.
>
> If it does not work even with the APM module loaded, you might have to
> enable CONFIG_APM_REAL_MODE_POWER_OFF. Quoting from the help text for
> this option:
>
> Use real mode APM BIOS calls to switch off the computer. This is
> a work-around for a number of buggy BIOSes. Switch this option on if
> your computer crashes instead of powering off properly.