PowerTOP Can Still Extend Battery Life On Linux
Phoronix: PowerTOP Can Still Extend Battery Life On Linux
Following the recent release of PowerTOP 2.1 I did some testing from a modern Intel notebook to see what kind of power-savings one can expect from running the open-source PowerTOP software on a modern notebook running Ubuntu...
Installing laptop-mode-tools does all the tricks
If you install laptop-mode-tools your machine toggles all the optimizations by itself depending on power state. At least that's how it works with pure Sandy Bridge (my one's a Lenovo X220 with i5-2520). Only the VM writeback time-out isn't toggled, but that really doesn't matter much.
I'm wondering why Ubuntu doesn't install this package by default if a battery is present.
Does powertop get it right anyway?
I've looked at setting some of powertop's recommendations by hand recently and found that many of them were already set to a suitable power saving mode despite what powertop was saying. So does powertop just get it wrong sometimes?