In fact I have the same problem with GNOME battery applets. If I add the battery applet to the panel, I get this error message:
"Can't access ACPI events in /var/run/acpi.socket! Make sure the ACPI subsystem is working and the acpid daemon is running." And $ sudo /etc/init.d/acpid start * Loading ACPI modules... [ ok ] * Starting ACPI services... acpid: can't open /proc/acpi/event: Device or resource busy $ sudo fuser -v /proc/acpi/event USER PID ACCESS COMMAND /proc/acpi/event: haldaemon 4104 f.... hald-addon-acpi -- [Edgy] issues with dbus, powersaved, acpid and kpowersave https://launchpad.net/bugs/64646 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs