I manage a number of remote kiosk systems. After upgrading to 20.04 Desktop, I believe some issues are being caused by some of the power saving features that can be disabled via the Settings > Power control panel, but for these systems I only have command line access.
Is there a way to disable these (in particular Automatic Brightness, Dim Screen While Inactive, and Automatic Suspend) from the command line?
Many of the settings of the Gnome Desktop are configured through dconf. You can see all possible settings if you install the graphical tool dconf-editor. If you know the settings, you can control them using the gsettings command:
To disable automatic brightness:
gsettings set org.gnome.settings-daemon.plugins.power ambient-enabled false
To disable dim screen while inactive:
gsettings set org.gnome.settings-daemon.plugins.power idle-dim false
To disable automatic suspend:
gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-ac-type 'nothing'
gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-battery-type 'suspend'
To undo, i.e., reset these settings to default, run the same commands, substituting reset instead of set, and leaving out the last argument.
I believe you can disable the DPMS or Display Power Management Signaling from the command line.
First to check if it is enabled:
xset -q | awk '/DPMS is/ {print $NF}'
Example:
xset -q | awk '/DPMS is/ {print $NF}'
Enabled
To disable it:
xset -dpms
To enable it:
xset dpms
Hope this helps!
