Re: [PATCH][RFC] Kill off legacy power management stuff.

[Bill Davidsen]

Robert P. J. Day wrote:
> On Tue, 17 Apr 2007, Bill Davidsen wrote:
>
>   
> > Rafael J. Wysocki wrote:
> >     
> > > [appropriate CCs added]
> > >
> > > On Friday, 13 April 2007 02:33, Robert P. J. Day wrote:
> > >       
> > > > just something i threw together, not in final form, but it represents
> > > > tossing the legacy PM stuff.  at the moment, the menuconfig entry for
> > > > PM_LEGACY lists it as "DEPRECATED", while the help screen calls it
> > > > "obsolete."  that's a good sign that it's getting close to the time
> > > > for it to go, and the removal is fairly straightforward, but there's
> > > > no mention of its removal in the feature removal schedule file.
> > > >         
> > > It's been like this for a long long time.  I think you're right that it can
> > > be
> > > dropped, but I don't know the details (eg. why it hasn't been dropped yet).
> > >
> > >       
> > One reason was that there are (were?) a number of machines which only powered
> > down properly using apm. It was discussed as part of shutting down after power
> > failure when your UPS is running out of power.
> >     
>
> um ... what does APM have to do with legacy PM?  two different issues,
> no?
>   
Since the patches are going into apm.c and apm was used for suspend and 
poweroff before ACPI was a feature of the hardware, I assume there's a 
relationship. As of 2.6.9 ACPI still couldn't power down one of my old 
boxes, it hasn't been updated since that time, so I can't say what later 
kernels will do.

--
bill davidsen <davidsen@xxxxxxx>
 CTO TMR Associates, Inc
 Doing interesting things with small computers since 1979

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