Hi,
thanks for sharing your ideas! We will think about adding the screen turn on/turn off feature to the screensaver options and check if this works.
Regarding HDMI and touchscreen at the same time or changing on the fly with a switch:
I am sorry, but this is currently not possible with Kodi. Some Apps (like omxplayer) support to choose from connected HDMI and DSI displays, but Kodi doesn’t support it. The only option is to change the default display and reboot. To do this you have to add following to the file /boot/config.txt and reboot.
display_default_lcd=0
This is only helpful, if you want to use it without the touchscreen, as you need to revert the changes and reboot to get the touchscreen running again. We will think about adding this parameter to the Display configuration in the web interface as it helps to improve the „activation“ process of HDMI.
EDIT: I just added this switch to the Max2Play Web interface to the current BETA. You may find it in the „RPi Display“ Addon.
