12-13-2012 01:26 AM
01-22-2018 12:30 AM
My adjust Brightness feature of T520 have disappeared on windows 10.
Then I found a solution on HP community and tried that worked for me.
Go to Device Manager then Go to Monitors. Delete or remove existing monitor. Then Right click and Scan for Hardware changes. It recognised my monitor as LCD 1600x900. Previously it was default as PNP Monitor.
After that process it worked fine and in right side bar of windows 10 Brightness adjust icon also appeared.
Give it a try