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10/28/2014 at 20:57 #82142
gizmo98
Participant

RetroPie lowers the resolution if you start a game. The main reason is performance. Most games are slow in Full HD. Some emus use VGA, some use 720p. Retropie uses the script runcommand.sh (/opt/retropie/supplementary/runcommand/runcommand.sh) to do this.

Take a look into /etc/emulationstation/es_systems.cfg to see what video mode is used.