Bug#687045: pulseaudio: Audio delay and crackling at startup

[David Smith]

On 04/18/2014 06:01 PM, Felipe Sateler wrote:
>
> This may be a problem of too high CPU usage. Can you try changing the
> resample-method key in daemon.pa?
>
> I think the 'trivial' resampler should be the less cpu-hungry, so you
> should probably try that first.
>

That doesn't make any sense though, my laptop is an 8-core laptop that's
sitting idle almost all the time when the crackling/popping happens.

It *COULD* be something related to the frequency of my CPU changing..  I
realized that the new intel power management stuff is clocking my CPU
all over the place.. In the old days it would only cycle between 3 or 4
different frequencies and it would be very slow about reclocking.. Now
it's almost instantaneous reclocking of the CPU to save power and it's
got a lot of different frequencies it can clock to..

If I set my CPU to a fixed frequency, either the lowest or the highest
possible frequency the CPU supports, the entire problem disappears.

But I'm not going to run my CPU on a fixed frequency like that because
it's always either inconveniently slow or a power hog.  So I need to use
the configuration change to pulseaudio described above which seems to
fix the problem entirely.

-David