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.

I wish I was having the above problem but mine is totally different. I have a Sony Vaio VGN-FS415B laptop running opensuse 10.2. The problem I have is that when the system is running on AC adapter, the system takes about two minutes to boot up, opengl screensavers and video playback are very jerky despite kpowersave reporting the cpu speed at 1.73 GHz!. This problem is not apparent when running on just the battery, the system boots up in less than a minute and kpowersave reports the cpu speed at 800 MHz. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org