ACPI temperature

Steven Friedrich freebsd at insightbb.com
Tue Dec 1 21:00:03 UTC 2009


On Monday 30 November 2009 04:59:51 pm you wrote:
> 2009/11/29 Steven Friedrich <freebsd at insightbb.com>:
> > On Sunday 29 November 2009 11:03:28 am you wrote:
> >> 2009/11/29 Steven Friedrich <freebsd at insightbb.com>:
> >> > I booted my HP Pavilion zd8215us and I immediately invoked
> >> > chkCPUTemperature. The first temp reported was 52C, which is 125.6F.
> >> > This leads me to believe that acpi has an anomaly regarding
> >> > temperature measurement. The ambient temp was 71F (21.6C). The machine
> >> > had been off for over eight hours.
> >>
> >> I'm not sure.  My laptop shows about 59C as soon as I can
> >> log in, in a room kept around 16C ambient.  It rather quickly
> >> drops to <40C if I let it idle with powerd doing its thing.
> >
> > Thanks for the response. One question though, what OS are you running.
> >
> > The reason I ask is because I want to discover if it's FreeBSD specific
> > or possibly affecting Linux distros as well. And if you're running
> > FreeBSD, which version.
> 
> I think CPU use/temp during boot-up _could_ vary a lot from
> one operating system to another, I don't know that it must,
> though, since the whole business is arcane and full of magic
> (much like poutine).
> 
> FreeBSD 8.0-RELEASE #1: Mon Nov 23 13:47:06 EST 2009
> amd64
> 
> It's a turion x2 of 1990MHz
> 
> I only had windows on long enough to burn one CD back in
> February, so I have not the least clue how it behaved (besides
> terribly).
> 
> I can't find any way to get the actual temperature values under
> Opensolaris, but I do dual boot.  It spends so much time starting
> so many mind-bogglingly worthless services prior to giving me
> a log-in prompt that I'm not sure the comparison is fair.  The fan
> usually kick into high prior to the log-in prompt, though.
> 
> Opensolaris is pretty horrible in terms of performance and battery
> life compared to FreeBSD. It's also like a strange, alien wasteland
> what with bash & gnome & other linuxisms, except pfexec.
> pfexec rocks.
> 
I wasn't thinking that the actual temperature varied from one OS to another, I 
was thinking that Linux might have a different version of ACPI or that FreeBSD 
might have a bug that Linux doesn't.


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