Today's update solved the issue on my Acer as well.
Cannot Change brightness after upgrading to 1803 RTM, previously it was fine .
I had to reset windows because on installing build 17127 , it botched. Even in the botched state it had no brightness control.
Now , I don't have it even after upgrading to 17133 or 1803 rtm .
I have tried , installing / uninstalling Intel HD graphics driver ( very old , core i3 first gen PC)
I have installed/uninstalled Monitors >generic PnP monitor drivers .
(monitor.sys ) is the said driver that allows / disallows F2/F3 brightness hotkey , while brightness never changes. Can you give Monitor.sys from an earlier build such that it can be tested , how do I replace the driver.
Windows for home | Windows 10 | Devices and drivers
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Anonymous
2018-06-13T16:00:37+00:00 -
Anonymous
2018-06-13T16:11:03+00:00 Now fixed after update on my HP Elitebook 2540p
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Anonymous
2018-06-13T21:35:54+00:00 Looks like Microsoft released an update that fixed the brightness issue with my HP laptop. So I'm good to go.
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Anonymous
2018-06-14T05:11:58+00:00 New update come back brightness change on Acer 3820TG. Works perfectly, great job Microsoft!:)