That’s basically it … the brightness drops to minimum, sometimes several times a day. I’ve turned auto-brightness off: no change - back on again: no change. Each time I open Settings and push it up to about half way. It’s getting annoying, especially if I’m in a rush.
What to do? The phone is under warranty … I’m on Android V10.
TIA
This is a known software bug since the last update and help is on its way:
Wow, that was quick! Where is it best to get the update from? I’m a Fairphone Newbie, although familiar with the Internet, Unix and most [old school] protocols … 8^)
Many thanks.
Once the update is published (it isn’t yet) by Fairphone, you should get a notification on your FP3 once you can download and install it. 
See also
Check you have the latest update the 0129 one.
This actually is the proposed workaround until the update with the fix comes around.
Disabling adaptive brightness doesn’t fix the issue for you?
How exactly do you disable it?
I thought I’d done it in Settings → Display … which I have now just done & set brightness to to 80% ; will see how it goes. Thanks!
I have build number 8901.3.A.0129.20210805
Many thanks.
An official update can be found here: Software Update: 3.A.0129.20210805 (unknown caller and zero brightness bugs) - #414 by rae
It’s fixed! See Software Update: 3.A.0132.2021027
OK, fixed the link in my post above.
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