Re: apmd rpm missing

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Robert G. (Doc) Savage wrote:
> While comparing installed F13 rpms on a 32-bit laptop with a 64-bit
> laptop I found that apmd is not installed on the 64-bit machine. After
> trying to install it with yum I found that there are apmd rpms in
> Everything/i386 and Everything/source but not in Everything/x86_64. It's
> not just missing in my local repo -- it's missing in the
> Everything/x86_64 directory at download.fedora.redhat.com. I tried
> rebuilding the source rpm on the 64-bit machine and was abruptly advised
> "error: Architecture is not included: x86_64". There's no clue in 'man
> apmd'.
> 
> Is there more to this story?

At a quick guess, ACPI is the Chosen Successor to APM, and has been
since well before x86-64 was introduced. So even if APM could be made to
work on x86-64, I donât think anyone bothered, and you can be pretty
sure that the BIOS side will never have been tested.

http://www.faqs.org/docs/Linux-HOWTO/SMP-HOWTO.html:
    APM and SMP are not compatible, and your system will almost
    certainly (or at least probably ;)) crash while booting if APM is
    enabled (Jakob Oestergaard). Alan Cox confirms this : 2.1.x turns
    APM off for SMP boxes. Basically APM is undefined in the presence of
    SMP systems, and anything could occur. 

Yes, this applies for multi-core and multi-thread processors, too.

On the other hand, Fedora still supports 32 bit systems from the last
century, when BIOS support for ACPI could be extremely sketchy. So APM
can be a useful (working) fallback.

Hope this helps,

James.

-- 
E-mail:     james@ | The opinions expressed herein are not necessarily those
aprilcottage.co.uk | of my employer, are not necessarily mine, and in fact are
                   | probably not necessary at all...
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