A similar bug is affecting me, and maybe my situation can shed some light. I actually DO have two batteries in my laptop. If one of the batteries is depleted when I resume from sleep, I see this "battery is critically low" warning followed by suspend, even though the other battery has plenty of power. While the machine is running, the first battery drains without any problem, so this seems to just be a wake- from-sleep issue. Likewise, if I reboot the machine with one battery drained, it boots fine.
So my uneducated guess is that there's some battery-low event handler somewhere that gets triggered on wake and doesn't properly check the total power in all batteries. It looks like other reporters are having (an unrelated?) problems with phantom batteries, which could be leading them to the same issue I'm having with real batteries. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-settings-daemon in Ubuntu. https://bugs.launchpad.net/bugs/838543 Title: False battery warning +suspend Status in “gnome-settings-daemon” package in Ubuntu: Confirmed Bug description: I pulled the plug on my laptop with it's battery full: ubuntu@ubuntu:~$ cat /proc/acpi/battery/BAT1/state present: yes capacity state: ok charging state: charged present rate: 0 mA remaining capacity: 7200 mAh present voltage: 11100 mV ubuntu@ubuntu:~$ ubuntu-bug -w ubuntu@ubuntu:~$ cat /proc/acpi/battery/BAT1/info present: yes design capacity: 7200 mAh [...] And suddenly got a dialog saying that it was critically low (while the icon top-left appears, properly, as full) and the laptop did suspend shortly after that. ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: gnome-control-center 1:3.1.5-0ubuntu4 ProcVersionSignature: Ubuntu 3.0.0-9.15-generic 3.0.3 Uname: Linux 3.0.0-9-generic x86_64 Architecture: amd64 CasperVersion: 1.280 Date: Thu Sep 1 02:26:17 2011 ExecutablePath: /usr/bin/gnome-control-center LiveMediaBuild: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110831) SourcePackage: gnome-control-center UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/838543/+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