Recently I added a new RPi 4 to my current Screenly project (the first one in the project because the rest are RPi3).
It seems there’s no way to force the output to the desired resolution (1920x1080) modyfing the config.txt file as every time the RPi4 restarts, the config file returns to its original content.
The content I added to change this behaviour:
These parameters come from this link:
When I insert the microSD with this configuration and switch on the RPi, I can see the changes because the wellcome screen is showed in FULLHD. Then the RPi restarts itself and the next time I see the wellcome screen it shows in 4K. Checking the config.txt file, the configuration I made dissapeared.
My TV not supports 4K and is very frustating. Could you please help?
Thanks in advance.