I’m trying to understand why the backlight is still on this little 4" screen when the touch screen screensaver timer triggers. The screen is blank (all black pixels), but it is very clear the backlight is on. Just finished installing Volumio and the touch screen plug in for the first time, so I’m still getting used to it.
What can I tell you to help solve this little issue?
Hmmm, so it does - guess I thought that was part of the OS. You wouldn’t happen to know how to check the firmware and/or update it to the latest official bits (not pre-release)?
Still getting used to this little piece of hardware… Also need to figure out how to calibrate the touch screen, as it doesn’t seem very accurate or responsive. Oh, so much learning
Well, hdmi_blanking=1 yields interesting results. When the screen saver kicks in, the screen turns off, then turns on, then turns off - just constant blinking. The pixels are all black, but the backlight just keeps flashing on and off at about a 1 second interval.
This is the same behavior I see when (without the hdmi_blanking setting) when I tell Volumio to shut down. It shuts down, but the screen just blinks in the same way.
I had another look at the wiki page you had linked above. According to the wiki your display has a backlight adjustment button to adjust brightness and switch the backlight on/off.
I could imagine that this prevents the backlight from turning off permanently as long as you don’t press the hardware button. In this case, there would be no solution that could be achieved with reasonable effort IMHO.
Another reason for your issue could be the hdmi related entries in the userconfig.txt. I know that the values you are using correspond to those one can find in goodtft’s GitHub repo, so appears unlikely that changing them would improve something. But if nothing remains it may be worth a try to remove config_hdmi_boost and all hdmi_* related lines except hdmi_blanking=1 and test if the display (a) still works and (b) backlight control behaves better. But expect nothing.
