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This happens to me more than I'd like to admit, but sometimes I don't notice the power getting low since it only shows up in my status bar, then the computer just quits. I'd like a big alert that warns me before this happens. Is there any way for it to alert me? Ubuntu has a nice popup that tells you it's getting low.

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Configure the power-manager from your desktop environment to do "something" - this can usually range from "nothing", over "run a command", to "hibernate"/"power off". – peterph Jan 9 at 19:33
Which desktop environment? – Renan Jan 10 at 0:17
@peterph I only have the "Power off" and "Hibernate" options. – Travis R Jan 10 at 2:22
@Renan running Cinnamon. – Travis R Jan 10 at 2:23
@TravisR sorry, I meant to say configure the behaviour when critical battery level is reached – peterph Jan 10 at 8:33

2 Answers

up vote 2 down vote

write a script!

battery_level=`acpi -b | grep -P -o '[0-9]+(?=%)'`
if [ $battery_level -le 10 ]
then
    notify-send "Battery low" "Battery level is ${battery_level}%!"
fi

then cron it to run every few minutes or so. But yeah, if you can do it through the GUI, that's probably a much better way of doing it.

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up vote 0 down vote

As I don't have Gnome Shell or Cinnamon installed, I cannot be of direct help as accessing the source could would be much practical since it's rather easy adding such a rudimentary extension with JavaScript.

You should open :

/usr/share/cinnamon/js/ui/status/power.js

and search for percentageText - subsequently, you ought to be able to add a pop-up message or alert.

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Interesting, didn't know this stuff is in javascript. But no /status directory and no power.js I can find anywhere in the /cinnamon/js directories. – Travis R Jan 12 at 18:09
Have you tried to search for it from root using : find / -type f -name power.js – nesyphlopanuri Jan 13 at 14:32
Ran that, nothing found. – Travis R Jan 14 at 22:46

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