Re: APM

["Joris" <jopa@subdimension.com>]

> I have just recompiled a new kernel, version 2.5.18; I use the same
> settings for APM, as it were. Problem is, now my ATX motherboard
> wouldn't completely shutdown after the shutdown command being issued. I
> hear the same clicking of the power relay during the poweroff, but the
> power light (LED) would remain on; after that, the reset button would
> start the computer when pressed. It seems that the machine is going
> sleeping after the shutdown command. Has any of you encounterd something
> like this?

I had the same problem with a self-compiled 2.4.18, and it took me a
while to find out that support for multiple processors was enabled. 
The option is named CONFIG_SMP, in menu-driven config you can find it
as "Processor type and features"->"Symmetric multi-processing support".

I don't know for 2.5.xx kernels, but in the debianized
2.4.xx-kernel-source series, it is enabled by default. I wonder why. The
documentation for this option clearly states:
* 'If you have a system with only one CPU, like most personal computers,
say N'
* 'If you say Y here, the kernel will run on many, but not all,
singleprocessor machines. On a singleprocessor machine, the kernel will
run faster if you say N here.' 
* 'The "Advanced Power Management" code will be disabled if you say Y
here.'
* 'If you don't know what to do here, say N.'

Could I file this as a bug report? Or is there a good reason for this
choice? IMHO, changing it would prevent many complaints about apm-not-
working-anymore-after-baking-custom-kernel. Or is is too small a detail
to disturb the maintainer with?

(sorry for repeating myself, I already posted this statement)
Just my 2 cents,

Joris


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