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The problem is the same as here:

  1. The icon does not change when the power cord is plugged in or unplugged (the icon remains a battery if that was the power source on boot but won't change if I plug in the power adaptor and visa-verse).

  2. The battery indicator does not give me a low battery warning or alert (ubuntu just shuts down with no onscreen warnings).

Info:

  • I use Ubuntu 12.04 LTS, 64 Bit
  • Reinstalling gnome-power-manager didn't work
  • acpi -b returns "Battery 0: Unknown, 95%"
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And did the answer given there help? –  guntbert Mar 5 '13 at 21:31
1  
It didn't. I don't have aptitude so I used apt-get to remove and reinstall it. –  Benjamin Mar 7 '13 at 9:50
    
Exactly same issue here. –  theharshest Nov 14 '13 at 17:18
    
I think then that you may need to break this down. gnome-power-manager uses the package UPower. So you will probably have this installed. When you run upower --monitor-detail and disconnect/reconnect from an outlet do you see detail lines from that? (I tried and I do) –  rocky Jun 24 at 1:43

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