smart backlight control problem

[narsimelus]

I'm using Xperia Z2 for 2,5 months and its smart backlight control is not working generally. I use "adopt to lighting conditions" for brightness (i'm writing this because it's suggested in an old post), i activated smart backlight control from the beginning and... No, it's not working. 

I open a photograph and stare at it for a while. My "sleep" starts in 30 seconds and although i directly look at screen, it starts. The screen turns off. No smart backlight thing. 

Now, am i missing something or is there a situation that Sony could not handle this property? Before this one, i used Samsung S2 and i know smart backlight control is a software property (in Android 2.3.5 there were no "smart backlight" in this phone, but with Android 4.1 it was ok). Then, what is the reason of this problem?

Thanks. 

[minus28]

I'm reading this in 2017 on an x compact running Nougat and the problem is still exactly the same, there has been zero development by Sony on this problem. If you hold the phone normally in your hand as you read, the screen just times out and switches off. As mentioned here, even going right back to a Samsung galaxy s2 you get a better solution to this!

[Jawtisjawtis]

I got this problem after updating my xz premium to android 9 

[mr_max82]

I also have this problem after updating to android 9. And yes, I also have xz premium. Problem occures very often, and the situation is way worse when i have my phone in car holder and im driving.