Local Raspberry Pi gameplay doesn't work

[markostamcar]

Thanks for this project, it's really pushing TTX to new limits, I LOVE IT! :) :)

I would like to use the same RPi for both TTX output and Doom game execution but it doesn't seem to work for me.
Streaming via netcat from Ubuntu laptop to RPi works fine.
I then compiled Doom on RPi and when I run it, the game is shown on the TV but there is no TTX data.
But if I capture netcat output to a file and then pipe it to raspi-teletext, it works.
I suspect Doom SDL window somehow disables or interferes with TTX signal generation.

Any tips welcome! :)