Bug 1636 – We should enable power management by default

Bug 1636 - We should enable power management by default


Summary:	We should enable power management by default

Status:	CLOSED TRACKEDINBUGSTER

Product:	opensolaris
Component:	kernel
Version:	unspecified
Platform:	Other Solaris

Importance:	P3 normal (vote)
Target Milestone:	---
Assigned To:	Watcher account for OpenSolaris kernel bugs
QA Contact:

URL:
Whiteboard:	BugsterCR=6647538
Keywords:

Depends on:
Blocks:
	Show dependency tree / graph

Reported:	2008-04-26 10:44 UTC by Bart Smaalders
Modified:	2008-08-02 23:41 UTC (History)
CC List:	5 users (show)

See Also:

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Description Bart Smaalders 2008-04-26 10:44:35 UTC

aubreylee@gmail.com wrote:
On Fri, Apr 25, 2008 at 7:07 PM, Sriram Natarajan
<Sriram.Natarajan@sun.com> wrote:
> >  * Indiana RC2 is still burning not lot of power when I run on my Tecra
> >  M2. On battery, Windows XP (my other boot partition) gives me close to 2
> >  hours of battery. With Indiana RC2, I could hardly cross more than 45
> >  minutes. If there is some way, I can get better battery life, I would
> >  really really appreciate
> >
Yeah, power saving will be a long way of opensolaris, not specific on
indiana only.
Currently, cpu power mangement option is not enabled by default.
If you are aware speedstep is supported on your laptop, you could
enable it(dtpower(1M)).
It can definitely make your battery life longer.
.... <and in another followup wrote:>

okay, I checked just now, not there really.
So we have to edit power.conf(4) manually.
Add the following entry to /etc/power.conf
==============
cpupm            enable
cpu-threshold    15s
=============

Then run pmconfig.
Thanks,
-Aubrey

Comment 1 Aubrey.Li 2008-04-26 19:38:46 UTC

cpupm option is not enabled on nevada as well. I think the performance is the
preference...

Comment 2 Gregg Sporar 2008-06-26 11:02:30 UTC

>we have to edit power.conf(4) manually

Will some sort of UI be added for modifying these settings?

Comment 3 Bart Smaalders 2008-06-26 13:42:38 UTC

> Will some sort of UI be added for modifying these settings?

Almost certainly.... the exist GUI commands in previous Solaris releases used
CDE/Motif, which are not part of OpenSolaris at present for legal reasons.  The
entire power management framework is being redesigned anyway as part of project
Tesla from what I understand, so this is all in a state of flux.  For now,
we'll just enable cpu power management by default using the existing mechanism
(/etc/power.conf). Once Tesla makes enough progress, it will make sense to
provide a proper GUI.

Comment 4 David Comay 2008-08-02 23:41:22 UTC

This was recently addressed in Nevada build 96.