Adaptive brightness doesn't learn my preferences

frickinchickin

Is there anyway I can set a minimum brightness level? Also, will the Adaptive Brightness feature be fixed any time soon? It says manually moving the slider will help it learn your preferences, but our lie detector test has determined that was a lie.

unwat

frickinchickin

Unfortunately, the only way that I know of to change the minimum brightness is by modifying a config file then building your own version of the OS (this value, btw).

I tried to search for other ways, but there are no setting or device config values that can be changed that will affect min/max screen brightness, or at least as far as I can tell.

frickinchickin It says manually moving the slider will help it learn your preferences, but our lie detector test has determined that was a lie.

Where does it say that? The stock OS might do that, but I don't know if AOSP does. Either way, I'd agree that the AOSP brightness whatever algorithm isn't great. My phone's screen is also too dark sometimes.

frickinchickin

Surreal5954

unwat Where does it say that? The stock OS might do that, but I don't know if AOSP does. Either way, I'd agree that the AOSP brightness whatever algorithm isn't great. My phone's screen is also too dark sometimes.

In GrapheneOS If you tap on Adaptive Brightness in the settings menu it reads 'Your screen brightness will automatically adjust to your environment and activities. You can move the slider manually to help adaptive brightness learn your preferences.'

unwat

Surreal5954

Found it. I've never actually opened the menu item there so I don't think I've every actually seen it.

I poked around Google's AOSP code. I am thinking that the stock OS has proprietary adaptive brightness code that's not in AOSP. Searching around the internet, I read stuff about the phone using "AI" or "machine learning" to "learn" a user's preferences. That's not the case in AOSP. The AOSP implementation does technically live up to the "learn" a user's preferences claim, but it's not too fancy and is very limited.

Kind of what it boils down to is they set up a spline curve, which they call a "short term model". There's a default that's created, then when the user changes the brightness by dragging the slider, a point is added to the model's curve, then the curve is recalculated and smoothed. It doesn't seem to store old points, it just uses the defaults + the new user added point. The phone uses that model until the brightness is changed by the user again, or if the model is invalidated for some reason.

cascaderainfall

It does learn your preferences. It's just kinda dumb

strcat

Pixel adaptive brightness is not the same as the AOSP implementation. AOSP is much less intelligent. It does work properly, it just isn't as good as you're used to on the stock Pixel Os. It could be improved but we aren't going to add any significant complexity to it, only minor tweaks to configuration values at most. It could be improved in AOSP.

ve3jlg

strcat . AOSP is much less intelligent. It does work properly

It has never worked properly in my experience.
As others have noted it always resets to about 20% and is a very annoying part of GOS.

it just isn't any good.

GrapheneOS

ve3jlg You're welcome to use manual brightness. The auto brightness implementation is the standard one included in AOSP. Pixel adaptive brightness is better.

Countdown9

If using the pixel8 phone in a dark room the screen is so dark that it's unreadable. Wish that the minimal screen brightness in post 3 were higher in grapheneOS builds. Forced to use manual brightness.