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I use the Fn+ buttons with the -sun and +sun on them, and the brightness doesn't seem to change. I have also tried to change the brightness on the bar at the top right. Neither of these seems to work, I googled the problem, but it doesn't seem to be for Ubuntu 20.04 LTS. I could change the screen brightness when I switched to windows 10.

This is the link I was looking at but for the previous versions of Ubuntu.Will the solutions they propose still work or do I have to find another way? I cannot change the screen brightness

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Try installing intel graphics drivers. sudo apt install xserver-xorg-video-intel And then use xbacklight command like xbacklight -inc 25

  • I tried but xbacklight did not seem to make a difference with brightness – Tony Sep 6 '20 at 12:34
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I found it. It was the second answer provided by Renato Miotto.

Ubuntu 20.04 brightness adjust not working

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