Still wrong with gnome-power-manager 2.22.1-1ubuntu4.
gnome-power-manager disables DMPS timers. Here is a fast way to reproduce the issue:
$ xset dpms 0 0 120 ; xset q | grep Standby Standby: 0 Suspend: 0 Off: 120
$ gnome-power-preferences [change "Put display to sleep..." setting, then close]
$ xset q | grep Standby Standby: 0 Suspend: 0 Off: 0
Still wrong with gnome-power-manager 2.22.1-1ubuntu4.
gnome-power-manager disables DMPS timers. Here is a fast way to reproduce the issue:
$ xset dpms 0 0 120 ; xset q | grep Standby
Standby: 0 Suspend: 0 Off: 120
$ gnome-power- preferences
[change "Put display to sleep..." setting, then close]
$ xset q | grep Standby
Standby: 0 Suspend: 0 Off: 0