PowerNow in mobile AthlonXP

[Simon Dick]

On Sat, 2004-03-13 at 00:01, Bruno Ducrot wrote:
> On Thu, Mar 11, 2004 at 01:05:57PM -0500, Scott Lambert wrote:
> > On Thu, Mar 11, 2004 at 09:17:11AM +0100, antic_eye wrote:
> > > Hi there,
> > > 
> > > I googled all the web for a solution, so I hope you could help me. I
> > > have a PackardBell Laptop with a mobile athlon xp inside. I installed
> > > FreeBSD 5.2.1 3 weeks ago and everything works fine. Even the screen
> > > flickering under x I fixed (it lasts me one week :o)).
> > > 
> > > My problem is, that I dont know how to trottle the cpu frequency. Linux
> > > has the cpufreqd. Is there anything appropriate in BSD? ACPI is up and
> > > running (expect the StandBy mode - it doesn't work)
> > 
> > I think Nate Lawson is working on getting a generic CPU frequency
> > maniplation system added.  My athlon laptop also runs full speed all the
> > time and has no throttle options in the acpi sysctls.
> > 
> > hw.acpi.cpu.cx_supported: C1/0
> > hw.acpi.cpu.cx_lowest: 0
> > hw.acpi.cpu.cx_history: 42619368/0
> > 
> 
> That strange.  I would expect that your laptop will support at least C2
> since without it a laptop based on Athlon is somewhat overheaten.

My XP2400+ laptop does show C2:
simond at laptop:~$ sysctl hw.acpi.cpu
hw.acpi.cpu.cx_supported: C1/0 C2/90
hw.acpi.cpu.cx_lowest: 0
hw.acpi.cpu.cx_history: 62780232/0 0/0