This had been plaqueing me too for a long while until I discovered that you
need to call halt with the -p switch. IIRC there should be some more
documentation specific to APM in /usr/src/linux/Documentation explaining
this.
> ----------
> From: Shawn Craver[SMTP:[EMAIL PROTECTED]]
> Sent: 16 August 1999 14:21
> To: [EMAIL PROTECTED]
> Subject: APM support in 2.2.11
>
> I have succsessfully compiled the 2.2.11 kernel on my RH5.2 system. I
> upgraded all of the neccessary packages, and recompiled the kernel. The
> only problem is that the power-off on shutdown doesn't work, even though I
> compiled in APM support and the power-off on shutdown options. I followed
> the kernel-compile HOW-TO and docs that came with the 2.2.11 kernel
> exactly when I installed the new kernel, but APM support still won't work.
> Any ideas?
>
> --Shawn Craver
> University Of Connecticut
> Computer Science and Engineering
> Undergraduate Student
>