Re: cpufreq default governor

From: Michal Piotrowski
Date: Tue Apr 24 2007 - 09:08:26 EST

On 24/04/07, William Heimbigner <icxcnika@xxxxxxxxxx> wrote:
On Tue, 24 Apr 2007, Michal Piotrowski wrote:

> On 24/04/07, William Heimbigner <icxcnika@xxxxxxxxxx> wrote:
>> On Tue, 24 Apr 2007, Michal Piotrowski wrote:
>> > Hi William,
>> >
>> > On 24/04/07, William Heimbigner <icxcnika@xxxxxxxxxx> 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?

It works, but for me this sounds are very weird ;)

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.

Ok, it might be normal behavior. I might be wrong, but IMO users
prefer speed and no strange sounds as default setting.

William Heimbigner


Michal K. K. Piotrowski
LTG - Linux Testers Group (PL)
LTG - Linux Testers Group (EN)
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at