I started to have this weird problem with my proximity sensor - when the proximity sensor activates, the screen turns off (normal) but when the proximity sensor deactivates, the screen will refuse to go back to high-powered mode. For example, someone will call me, I'll answer the call, put the phone to my ear, but when I take the phone away from my ear, then the screen is blank. I can press the lock key to make the low-power screen appear. The phone will seen ring and the missed call logo will appear on the low-power screen, but I cannot answer the call.

I know the high-powered screen works because I'm using it right now to post this message, and because I can lock the phone and immediately unlock it (i.e. without putting it in my pocket). I know the proximity sensor detects being out of the pocket because I can lock the phone, leave it on my desk and keep the clock showing up. I know the proximity sensor can detect being out of my pocket because the low-power screen will show. But for some reason the high-powered screen cannot reactivate after the proximity sensor has been activated, until I reboot the phone.

Any ideas? I'm going to reflash the phone when I get home otherwise and see if that fixes it, because even though this is ostensibly a hardware problem, it feels like a software problem.

Any ideas? I'm going to refresh

Some themes might cause that. I had same issue with Cyan75-theme. So if you've done any theme changing or ui-related mods, try to set the original blanco-theme and restore ui-mods to original.

If it works, you can try to set theme and/or ui-mods again see is the problem showing again.

I have a similar problem or maybe its just normal but during calls the screen goes to black and i cant use the phone at all, not even to end the call.

I presume this is not normal behaviour, known bug? any solutions?

Thanks.

Hey guys,

I just reset the settings on my phone, and that solved the problem. I'm inclined to think that it's a theme issue connected maybe to some of the stuff I did with N9Tweak.

I had the same very frustrating problem. I managed to solve it by opening the phone, removing the proximity sensor ribbon cable and reinstalling it back to the connector.

After I put the phone back together and booted it the proximity sensor strarted acting normal again.

I had the same problem yesterday and it was coming the system-ui mod from N9Tweak. The hacky brightness toggle was the root cause if it can help