[PaulOkinawa]

Brightness/Contrast controls do not work.
Any understandable suggestions? I'm not technically oriented.

[Atreyu]

you really have a better chance of getting an answer if you provide at least minimal information.

[PatK]

In a lot of Android systems this function may or may not work. The software is toggling hardware in the gfx section and for the most part there is just too many variants. Other systems might have this challenge depending on hardware drivers etc.

Your question is best served in the support section of your o/s, it's all in the details.

[PaulOkinawa]

Turned off hardware acceleration. Works fine now.