Let’s first find out what graphics/video card to do you have. The solution, that worked for me, is for Intel one. One relates to Nvidia graphics card and other relates to Intel graphics card. It turns out, there are two bugs related to brightness issue in Ubuntu. Brightness was at the maximum and my attempts to lower it went in vain. On my Dell Inspiron, using the function key to change the brightness did not yield any results.
In this quick post, we’ll see how to fix brightness function key not working in Ubuntu. We saw how to fix no sound issue and no network issue in Ubuntu in other posts. Some of the most prominent issues with Ubuntu are brightness control, wifi and sound.
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