06-27-2019 12:38 PM
Well, at first, not every device has that feature. I looked it up on Google, and in the Lenovo forum somebody asked for this as well. The solution would be to install the Lenovo Intelligent Thermal Solution Driver, which exists for neither the Flex 3-1570, the Flex 4-1570, nor either one of the two Flex 5-1570 options. Is Lenovo Vantage perhaps showing new driver updates? You might want to install these.
Did your device ever have the option? It might also be that this is a feature reserved for gaming laptops and/or ThinkPad devices.
07-01-2019 03:26 AM
Just like with the predecessor, I'm going to ask you: What is the 4-digit product type? There are Flex 1570 devices in the 3, 4 and 5 lineup. Which one do you have? Flex devices most likely don't have "Intelligent cooling". Automatic brightness adjust can be easily checked out by going to the Windows Settings->System>Display>Change brightness automatically when lighting changes (below the brightness changing bar)
If that option doesn't exist it doesn't have automatic brightness adjust.