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I would like my laptop to hibernate itself when the battery level is 10% to be sure it has enough power to complete the operation properly. Actually if I don't pay attention my laptop informs me it will hibernate when it's too late, so instead it brutally shuts down. This kills lithium batteries and is not acceptable.

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The approved answer above does not work on Ubuntu 12.04. – user1956808 Jun 25 at 21:03
up vote 37 down vote accepted
  1. Start dconf-editor
  2. Browse to org -> gnome -> settings-daemon -> plugins -> power
  3. Change the values of percentage-critical and percentage-action to the level you require
  4. Change use-time-for-policy to false
  5. Done!

You can also do this from a terminal with:

gsettings set org.gnome.settings-daemon.plugins.power percentage-critical 10
gsettings set org.gnome.settings-daemon.plugins.power percentage-action 9
gsettings set org.gnome.settings-daemon.plugins.power use-time-for-policy false
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Thanks. Ubuntu will not cost me 100s of dollars now FFS. – Salman Abbas Jul 26 '13 at 12:26
    
Tried this and having problem If you know how to solve this please let us know – Waqas Mar 7 '14 at 14:10
    
not luck on 15.04 64bit, 3.19.0-32, thinkpad t440p – enjoy Nov 17 '15 at 11:15
    
yep worked for me..Lenovo and Ubuntu14.04 LTS. – Manikandan Arunachalam Nov 27 '15 at 6:21
    
How to do it for 16.04 ? – Anmol Singh Jaggi Jun 10 at 21:35

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