CPU temp AC vs Battery

[Tank Abbot]

I had a same problem on my old dell and i never quite figured what the
problem was.

cpufreq_load="YES" solved it for me.

Thank you.

tabbot
http://www.yosumiru.com/

On 5/23/07, Eric Anderson <anderson at freebsd.org> wrote:
> On 05/01/07 15:12, Eric Anderson wrote:
> > On 05/01/07 14:26, Eric Anderson wrote:
> >> On 05/01/07 14:05, Nate Lawson wrote:
> >>> Eric Anderson wrote:
> >>>> On 04/26/07 09:52, Eric Anderson wrote:
> >>>>> Hi everyone,
> >>>>>
> >>>>> I've just noticed something very odd.  On my Dell D820 laptop, when
> >>>>> running off AC power from boot, by idle CPU temperature sits around 58C.
> >>>>>
> >>>>> If I unplug the power, and then plug it back in again, it will drop
> >>>>> down to around 49-50C within a minute or two.  It will stay there.
> >>>>> With or without powerd running.
> >>>> Another note:
> >>>>
> >>>> If I boot up without the AC adapter plugged in, it still runs hot.  Only
> >>>> the transition from AC -> battery seems to make a difference.
> >>>>
> >>>> Anyone with some ideas??
> >>> Does the temp change at all or is it stuck at 58C?  If stuck, maybe the
> >>> reading is incorrect and something in the AC line transition kicks the
> >>> EC back into operation.
> >> The temp does change, about 10C.
> >
> >
> > Hmm.. Seems also that my performance is reduced quite a bit.  Doing some
> > rather lame CPU benchmarks (ubench -c -s), seems that I get a score of
> > around 200k on AC before unplugging, and about 104k after
> > unplugging/plugging back in.  It definitely feels slower too..
> >
> > I don't see any speed changes or anything obvious in sysctl output.
> >
> >
> >>> If it changes, then perhaps something is generating a lot of interrupts
> >>> (perhaps SMI or SCI irqs).  More debug prints from the acpi-ca Notify
> >>> routine caller would help zero in.
> >>>
> >> Just add some printfs in there and recompile/reboot?
>
> Turns out that adding this to my /boot/loader.conf resolves it:
>
> cpufreq_load="YES"
>
>
> Eric
>
>
>
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