Bug#962910: Machine always entering hybrid sleep on critical battery, regardless of mate-power-manager preferences
package: mate-power-manager
Version: 1.24.1-1
Steps to reproduce:
1. Use Debian Mate with a laptop with a low battery.
2. Mate sends the message that the battery is low and it is about to hibernate.
3. The machine actually enters Hybrid Sleep.
This commit gives a clue: https://gitlab.gnome.org/GNOME/gnome-settings-daemon/commit/8e6a82c585fe16978f9e1ca3437a4b96dd4e6d34
Another clue is found by running upower -d, which on my machine, says the configured action is hybrid sleep.
Apparently now UPower performs the action rather than the power-manager so that the action will occur even if a desktop session is not running. I looked at the dbus documentation for UPower and it doesn't seem possible to set the hibernate action that way. Only way I could find was editing /etc/UPower/UPower.conf. I can't really see a path forward other than removing critical action from mate-power-manager preferences. I guess mate-power-manager should also be updated to read the critical action configured in UPower over dbus and notify the user what action will occur rather than reading its own gsettings key so at least it can give accurate information.
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