While it displays notifications of low battery and critically low battery, it doesn’t take any actions. GNOME Power Manager’s UPS support is buggy.Many older and higher-end UPS’s are serial-based. Currently, the nut-hal-drivers package only supports USB-based UPS’s.If your machine loses power at the login screen, it will not shutdown automatically. GNOME Power Manager is not running when you aren’t logged in.This method of monitoring a UPS is useful for a workstation, but there are three significant disadvantages: There are also gconf keys to change which thresholds are used, percentage or time left, and what those thresholds are. GNOME Power Manager can be configured to shutdown or hibernate the computer when the UPS battery level drops below certain thresholds. GNOME Power Manager system tray icon and tooltip.Ĭlicking the system tray icon and selecting UPS from the menu will give detailed information. An icon will appear in the system tray if everything is working. If it’s not running, you can start it from the command line or set it to start automatically in each session with the Sessions system preference. GNOME Power Manager should already be running and should automatically detect the UPS. On Debian or Ubuntu systems, install the nut-hal-drivers package. There are two different ways to monitor a UPS with nut: either expose the UPS hardware to GNOME Power Manager through hal or monitor the UPS directly with upsmon and upsd.

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