Re: Bug Report for Linux Kernel 3.x

[Arjan van de Ven]

On 8/24/2011 6:58 AM, Frederic Weisbecker wrote:
> (Please don't top-post)
>
> On Tue, Aug 23, 2011 at 08:21:50PM -0400, Steevven1 wrote:
> > QUICK NOTE - Thanks for replying directly to me as well as the mailing
> > list. I am NOT on that mailing list. Please continue to do this.
> >
> > That is correct about sparse irq. That was causing the first problem,
> > and solving that did in fact result in better power performance, but
> > it was apparently NOT the bulk of the problem.
> >
> > We still have no diagnosis at all for the apparently still-present
> > other (mystery) problem. Powertop now reports to me very low processor
> > wakeups (basically the same as the 2.6-series kernels), which
> > indicates to me that the problem is PROBABLY not related to processor
> > wakeups. I am by no means an expert. The top wakeup-causers with the
> > modified 3.0 kernel (no sparse irq) and an idle system are "[iwlagn]
> > <interrupt>" (wifi), "[i915]<interrupt>" (I don't know what this is),
> > and "[kernel scheduler] Load balancing tick"
> >
> > P-states/frequencies are handled about the same as with the 2.6
> > kernels, so I don't see a problem there either.
> >
> > What else can I check? It seems like powertop is telling me nothing
> > about this mystery power drain.
> Well, if powertop has nothing to tell about that, I have no clue where
> to go. I'm adding more people in Cc in the hope they can be more
> helpful.


make sure to use powertop 1.98

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