On Thu, Aug 24, 2006 at 08:44:25AM +0000, moreau francis wrote:
> Mips one seems to be a copy and paste of arm one and both of them
> have removed all APM bios stuff orginally part of i386 implementation.
The BIOS stuff makes no sense on ARM - there isn't a BIOS to do anything
with.
> It doesn't seem that APM is something really stable and finished.
It's complete. It's purpose is to provide the interface to userland so
that programs know about suspend/resume events, and can initiate suspends.
Eg, the X server.
The power management really comes from the Linux drivers themselves,
which are written to peripherals off when they're not in use. The other
power saving comes from things like cpufreq - again, nothing to do with
the magical "APM" or "ACPI" terms.
On embedded platforms, you shouldn't think about power management in
terms of the non-embedded PM technologies.
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 Serial core
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