I have a Fairphone 3+ which I pre-ordered. It runs Android 10, and I haven’t used another OS on it.
Every day, I use my FP3+ to read in bed, with lights in the room turned off. This results in a very low, constant light level. I live in the countryside and don’t have car headlights shining through windows or anything like that, and no devices in the room that spontaneously produce light (short of a very dim, flickering LED or two).
When using the phone like this, I regularly encounter an issue where, when automatic brightness adjustment has dropped the brightness to its lowest levels, the phone will, seemingly randomly, instantly jump to around twenty-five percent brightness, stay there for two or three seconds, and then return to zero. I haven’t been able to identify a pattern in occurrences of this issue, and it still happens if I manually set it back to minimum brightness after the jump occurs. It always jumps to the same amount every time, and it even occurs if I’m under the covers, so the only source of light would be the phone’s own screen. It doesn’t seem to matter what’s on-screen either; regardless of whether dark mode or light mode content is displayed, the problem still occurs.
I’ve tried restarting the phone, disabling and re-enabling automatic brightness adjustment, and cleaning the light sensor. Nothing seems to have any effect. Since this issue has been occurring, I’ve installed every new software update that’s been made available, but there haven’t been any improvements in this area.
This is not a major issue, and the rest of the phone works fine (apart from the Camera app freezing and crashing sometimes, but that’s an issue for another post), and overall, I’m happy with my Fairphone 3+. But this issue is annoying, disrupting my evening relaxation and my reading, so I’d be grateful for any help or advice for resolving it.