On my laptop, most of the times I resume from standby (i.e. suspend to RAM), the system will display a dialog box stating that my system is very low on battery and that it will hibernate (i.e. suspend to disk), which it does a few seconds later, even if I don't press Ok or Cancel on the dialog box.
Also, the battery on the laptop still has some good time to go (more than 1 hour) when this happens, so it's not that the battery is low on power.
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: gnome-settings-daemon 3.2.0-0ubuntu5
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Thu Nov 3 23:20:46 2011
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
ProcEnviron:
LANGUAGE=en_GB:en
PATH=(custom, no user)
LANG=en_GB.UTF-8
SHELL=/bin/bash
SourcePackage: gnome-settings-daemon
UpgradeStatus: No upgrade log present (probably fresh install)
From the additional tests I've run, this issue happens only when running on battery (i.e. when the laptop is NOT plugged in).