On Monday 26 February 2007, ken wrote:
> I have almost the same problem on my Dell.  When I switch from mains to
> battery, there's a CPU spike which lasts for several minutes.

That is perfectly normal.

On mains the pc runs at full speed.
On battery it drops to about half. Usually by changes to clock speed,
sometimes by entering a brief sleep mode.

You subtracted approx 50% of the CPU capability by switching to battery

So the cpu utilization goes up - it still has the same amount of
work to do, but its clock speed was reduced by the switch over
so it takes it longer to do each thing.  

This looks like a busier system, because it is busy a larger percent
of the available cycles.

Nothing surprising here.

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John Andersen
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