Last edited by graybison on 2019/8/16 00:08
Identical problem with Zenfone 5Q (5 Lite): Upgraded via OTA download from Asus from Android 7 (Nougat) to Android 9.0 (Pie). Then FM Radio stopped working. However, if the phone is rebooted in Safe Mode, then the FM Radio does work. So I agree, this is an app causing a software conflict. Unfortunately, I have been unable to determine which app is the problem. Yes, this occurs with the stock Asus supplied headphone and any other headphone. Easy work-around for me is to activate the screen saver (depress power button briefly), which activates audio, then speaker/headphone both work with radio until quiting from FM Radio. If starting the FM Radio again, must do the screen saver activation again for there to be FM Radio audio. This issue is reproduceable.