I got Ubuntu 15.04 running on a Dell 3147. Under Power settings, I have When plugged in set to Don't suspend. It seems that after the battery has reached 100% it no longer honors this setting, instead dropping down to the On battery power setting (which I have set for 20 minutes).

Any thoughts?

Is there any way I can say "when plugged in OR at 100%"?


Ubuntu and Batteries do not co-operate very well. I would suggest trying out TLP. I have found TLP to solve few of my Battery related issues from 12.04 LTS to 14.04 LTS on Dell Latitude Series.

Look the accepted and thoroughly written Answer here: Is there a power saving application similar to Jupiter? (Its too long to repeat, nor I wish to take credit for it -It helped me a lot)


sudo add-apt-repository ppa:linrunner/tlp
sudo apt-get update
sudo apt-get install tlp tlp-rdw


sudo apt-get remove tlp
sudo add-apt-repository --remove ppa:linrunner/tlp

Links to TLP Official Site for Further and extra information how set/edit/modify/configure TLP and its functions.


I highly recommend to read the above post and Linrunner TLP Guide.

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