My powersavings sofar:
With 1GB of RAM or more you dont need any SWAP, so article
(check on the beginning for wm.swappiness).
So wm.swappiness=0 with enough RAM.
No swap, less disk activity, less space required, and IMPROVED PERFORMANCE.
In /etc/fstab I added the "noatime" attribute. When accessing a file, no last accessed time is written to file.
All off the unnessecery services are shut off.
Syslogd is shut off. For a user system, there is no need for logging.
. None of these things wouldn't helped a lot if there was no laptop-mode. I'm not gonna explain what it does, couse my english is not that good, so read it for yourself.
Most of the time on my laptop I write or browse through the internet. So text gets saved on save button or when the laptop-mode takes action. As far as internet browsing goes, I noticed, when I go on a page, disk starts (write cache and page history). So what I did, I disabled the history and disk cache. So when I just browse the pages, the disk stays off, unless if the page has a cookie or a form, where I have saved username/password. <= For my use of laptop, it's a signifficant improve in powersave.
For CPU cpuspeed is used offcourse.
For graphics, I have ATI Radeon Mobility X700. I installed original ati drivers. The newer versions have now ATIPowerplay like in windows, to scale the gpu clock down when on battery. So when on battery, the gpu clock is at 1/3 of the full gpu speed.
And the last: for wireless i'm still testing if cutting down the TXpower on a 1/2 is bringing and improvement.
Sorry for my english.