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I am using ubuntu 12.04 and whenever i disconnect it from power supply the panel battery icon shows me the remaining time at regular interval but it doesnot make an alert when the battery runs out of juice. I am in need of a solution if the battery turns critical it can show me an visual alert, notification or even a sound so that i do not have to monitor the remaining time regularly

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Strange, in my system Ubuntu always shows me a Notification Bubble that the battery is running out of power. The bettery notification should be enabled in your system by default, try reinstalling the packages of NotifyOSD: sudo apt-get --reinstall install libnotify-bin notify-osd – Rodrigo Martins Dec 20 '12 at 19:33
WOW ! Let me try it out. Just a min ! – Arin Chakraborty Dec 20 '12 at 19:49
It really worked. I guess my notification system was faulty or something like that thanks for sorting that out ! Is there any way to manupulate this warning method ? just a query ! – Arin Chakraborty Dec 20 '12 at 20:12
Manipulate the NotifyOSD is possible, but I there are just few tweaks, as color changes, time for desappear and placement. I'll make my comment an answer so you can accept it. – Rodrigo Martins Dec 20 '12 at 20:16
If you want to try any manipulation:… – Rodrigo Martins Dec 20 '12 at 20:21
up vote 4 down vote accepted

Your NotifyOSD may be corrupted or set to do-not-disturb mode for some reason.

You can reinstall it by entering this command in the terminal:

sudo apt-get --reinstall install libnotify-bin notify-osd

Restart your system and from now on You'll get notifications when the battery is running out of power.

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