[mythtv-users] Advice required on low wattage combined system

[Bert Santema]

No, you need to do a bit more ;) I'll give a *very* brief description.

Basicly you just have to make sure the powersaving bits are enabled in the kernel.
 
To check if your currently running kernel supports PowerNow!, do 
   dmesg | grep powernow
Example output:
powernow-k8: Found 1 AMD Athlon 64 / Opteron processors (version 1.00.09e)
powernow-k8:    0 : fid 0xc (2000 MHz), vid 0x2 (1500 mV)
powernow-k8:    1 : fid 0xa (1800 MHz), vid 0x6 (1400 mV)
powernow-k8:    2 : fid 0x2 (1000 MHz), vid 0x12 (1100 mV)

If not, you need to recompile your kernel. 
When enabled, you then add a line to /etc/conf.d/local.start (or similar file if not using
Gentoo):
echo conservative > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

That should do it. You can check with 
cat /proc/cpuinfo

A full guide with more details and examples can be found here, it's written for Gentoo, but should
work with other flavours as well: http://gentoo-wiki.com/HOWTO_PowerNow%21

Cheers,
Bert


--- Marco Nelissen <marcone at xs4all.nl> wrote:

> >
> >I didn't go with an Epia as it didn't have enough grunt in my opinion and I wanted it to be
> >upgradable in the future. I went with an Athlon64 3200, Venice core, and have cool 'n quiet
> >enabled. It more than powerful enough, and is 99% of the time running in powersaving mode
> (1Ghz).
> >Plus it allows me to upgrade to dual core in the future (should that ever be necessary).
> 
> How do I get the machine to run in powersaving mode like that? I have "cool 'n quiet"
> enabled in the BIOS, but it seems like that is not enough.
> 
> 
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> mythtv-users at mythtv.org
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> 


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