LiveDisplay not working due to missing system file?

Added by Norton Boos 15 days ago

Does anyone know whether changing the color temperature in System -> Display and Lights -> LiveDisplay works? It seems that this works in LineageOS by changing numeric values in a file /sys/class/graphics/fb0/rgb but this file seems not to exist in Replicant (at least not on a Note 8 tablet with 6.0 0003 and a Note 2 with 6.0 0004 RC1). Is there any way to add this, or does this depend on non-free graphics firmware?