Resolve Windows 10 related issues for your HP computers or printers by HP Windows 10 Support Center
I still had the brightness control issue on my HP Pavillion 15 notebook PC;
suspected it was something to do with the AMD graphics driver;
I opened the 'Device Manager' app, and noted that the driver had stopped, due to some error code ? there was some kind of caution symbol next to it.
so I 'right click' to update the AMD Radeon(TM) HD 8610G driver.
After which, the F2/F3 brightness control started to work.
I'll give it some time, to check if the fix is permanent.
The problem is due to a bug in the graphics driver.
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