Happens to me as well. Dell D620. Upgraded from 11.04 to 11.10, then the problem started happening.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-power-manager in Ubuntu. https://bugs.launchpad.net/bugs/881750 Title: ubuntu 11.10 unity hibernate when battery full Status in “gnome-power-manager” package in Ubuntu: Confirmed Bug description: in Ubuntu 10.04 gnome had a bug that was worked around but cannot be done in Unity in 11.10 IN GNOME: Whenever I unplug my laptop from AC power, I get a window popping up that says "Laptop battery critically low. Computer will hibernate very soon unless it is plugged in." And a little notification pops up that says that the laptop has 5 minutes until the power drains. But when I click on the battery icon, it says that I have 4 hours of battery time remaining. My battery is a six cell battery with 97.1% charge capacity. I have no idea why it's saying that it's almost out of power. That doesn't come up if I turn on my laptop after I unplug it. Does anyone know why it's coming up or how I can disable it? WORKAROUND: If you open up a terminal and run gconf-editor, go to apps, navigate to gnome-power-manager, click on general, and then uncheck "use_time_for_policy", it will fix the warning messages. Some people (myself included) were also having trouble with it automatically hibernating/suspending when unplugged, and this fixes that issue also. IN UNITY THERE IS NO GNOME-POWER-MANAGEMENT SO HOW DO WE STOP THIS? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/881750/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp