?full cpuspeed?

[Sebastian Yepes [ESN]]

So how have you solved this problem..


On Friday 30 May 2003 5:32 pm, Bruce Cran wrote:
> On Fri, May 30, 2003 at 01:52:16PM +0000, Sebastian Yepes [ESN] wrote:
> > Hi all i have a Dell inspiron 8500 Notebook that have SpeedStep
> > when i am on AC power i just love my notebook, but when i gen on Battery
> > i can't even see a dvd & and my X run verry slow..
> >
> > is there and way to force fbsd to use 'hw.acpi.cpu.current_speed=8' when
> > i am on battery.. by the way 'hw.acpi.cpu.current_speed' is read only..
> >
> > -- sysctl --
> >
> > --AC Power--
> > hw.acpi.cpu.max_speed: 8
> > hw.acpi.cpu.current_speed: 8
> > hw.acpi.cpu.performance_speed: 8
> > hw.acpi.cpu.economy_speed: 4
> >
> > --Battery Power--
> > hw.acpi.cpu.max_speed: 8
> > hw.acpi.cpu.current_speed: 4
> > hw.acpi.cpu.performance_speed: 8
> > hw.acpi.cpu.economy_speed: 4
>
> There are two possible problems here.  If you power on on AC and switch
> over to battery, you can set the hw.acpi.cpu.economy_speed to 8 to get the
> full CPU speed.  If you power on using battery though, Dell have made it so
> you'll only ever be able to use 60% CPU speed, regardless if you later
> switch to AC. For example, my 2.0GHz i8500 boots up as 1.2GHz and is
> detected as such by FreeBSD.  The economy_speed sysctl will then throttle
> it further to 600MHz.
>
> --
> Bruce Cran
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