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SubjectRe: cpufreq default governor
On Tue, 24 Apr 2007, Michal Piotrowski wrote:

> On 24/04/07, William Heimbigner <icxcnika@mar.tar.cc> wrote:
>> On Tue, 24 Apr 2007, Michal Piotrowski wrote:
>>
>> > Hi William,
>> >
>> > On 24/04/07, William Heimbigner <icxcnika@mar.tar.cc> wrote:
>> > > Question: is there some reason that kconfig does not allow for
>> > > default
>> > > governors of conservative/ondemand/powersave?
>> >
>> > Performance?
>> >
>> > > I'm not aware of any reason why one of those governors could not be
>> > > used
>> > > as default.
>> >
>> > My hardware doesn't work properly with ondemand governor. I hear
>> > strange noises when frequency is changed.
>> >
>>
>> That doesn't mean it isn't working, though.
>
> I didn't say that cpufreq ondemand is broken. It's a hardware problem.
>
>> I here weird noises if the cpu
>> is clocked anywhere from 333MHz to 1GHz (sounds like an RD-D2 beeping
>> noises in ultra high pitch?)
>
> Yes, something like that.

Is it actually "not working" though, even at the hardware level? To my
knowledge those noises are normal, and aren't even signs of a harware
problem. I believe it is the natural result of changing frequencies at any
time. If you change frequencies, especially in the low end of available
frequencies, you should hear a very brief noise. A governor such as
ondemand, which is rapidly switching the frequency from say, 333 MHz to
2.66 GHz, is likely to make this much more noticable.

William Heimbigner
icxcnika@mar.tar.cc
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