First post ever - please be patient with noob 
I am using MPLAYER to watch TV through a Hauppauge TV tuner
Is there any way for a normal non-programmer to disable or reset the timer, or change the screen blanking delay to more than 15 minutes?. (setting not on tweaks, or dconf-editor)
Right now every 15 minutes the screen goes blank while watching TV - annoying
Problem not happening on Firefox - how do they do it?
Thank you in advance.
You can either run mplayer through gnome-session-inhibit:
$ gnome-session-inhibit mplayer // mplayer args go here
Or run it separately in a terminal:
$ gnome-session-inhibit --inhibit-only
In the first case, screen blanking is inhibited as long as mplayer is running, in the second case you have to terminate the command manually with CtrlC to re-enable screen blanking again.
try this
gsettings set org.gnome.desktop.session idle-delay 0
it turns off screen blanking
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