[Pm-utils] powertop suggestions

[Arjan van de Ven]

Stefan Seyfried wrote:
> Holy cow, NO!
> Laptop mode kills performance badly, even the performance of a NFS mount.

do you have any real data on this?
(and I mean on JUST kernel laptop mode; not any of the other stuff the 
laptop mode scripts poke at)

> And with my measurements showing that disk spindown has more psychological
> than real powersaving effects on modern laptop drives, i'd say we should
> not do it unless the users asks for "kill my performance badly for a few
> minutes more battery lifetime".

laptop mode does not spin down the disk.
laptop mode will save real power with ALPM; keeping the sata link idle 
longer helps; an idle sata link saves about 1W.