Been trying to get my latest Linux Laptop to behave nicely while on battery. It’s an Elementary Luna build. I came to the conclusion that there’s not much that can be done; it’s one of those things we leave to the OS authors, in this case Canonical.I ran a shell script test, it lasts for pretty much two hours dead, while running a script. (Not sure about the screen saver.) I should re-run the test while working.
Here are some links,
- http://www.ubuntugeek.com/how-to-improve-ubuntu-laptop-power-management.html , dated 2013, references TLP, which has its own site, http://linrunner.de/en/tlp/tlp.html
- http://askubuntu.com/questions/172391/is-laptop-mode-tools-still-relevant-for-12-04-and-the-3-x-kernels – argues that U12.04 is as good as it gets.
- https://help.ubuntu.com/community/PowerManagement/ReducedPower
- Before 12.04 there was powertop, named after top, http://linux.die.net/man/8/powertop, http://www.webupd8.org/2012/08/install-powertop-21-in-ubuntu-1204.html dated 2012, I think this is no longer optimal, and also http://askubuntu.com/questions/112705/how-do-i-make-powertop-changes-permanent and http://askubuntu.com/questions/420132/powertop-html-file-not-providing-echo-commands?rq=1
- http://manpages.ubuntu.com/manpages/hardy/man8/pm-action.8.html – the ububtu 12.04 man pages