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SubjectRe: [PATCH][RFC] Kill off legacy power management stuff.
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@tmr.com>
CTO TMR Associates, Inc
Doing interesting things with small computers since 1979

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