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I installed Ubuntu 18.04 recently. I have been using Ubuntu for over 5 years I know that the brightness controls are inside the Power section in the settings but they are not there anymore. Searching for brightness still brings Power section in settings as the only result in gnome-shell but I can't seem to find it.

Can someone please tell me how I control my brightness in Ubuntu 18.04

Here is a screenshot of power tab in settings Power Settings no brightness control

Kulfy
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akxer
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  • They do exist in the power settings. – singrium May 14 '18 at 10:02
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    I am not able to find them, wait I'll attach a screenshot – akxer May 14 '18 at 10:03
  • Well, that seems strange. Here is how the battery settings on PC look like : https://imgur.com/a/zY6nOeU. And I am using Ubuntu 18.04 – singrium May 14 '18 at 10:14
  • wow, that is completely different, I am using communiti theme, would that cause this problem? – akxer May 14 '18 at 10:15
  • are you also using communiti theme? – akxer May 14 '18 at 10:17
  • no, for now guys at canonical refrained from making it default, so it's probably some other issue – akxer May 14 '18 at 10:19
  • I tried the community theme right now, and the brightness settings still exist. here is the link of a screenshot : https://imgur.com/a/TrQVCBn – singrium May 14 '18 at 10:22
  • Maybe some system dependency is there that we don't know of – akxer May 14 '18 at 10:24
  • The Ubuntu Manual Refers to Gnome. Do we need to install That? I would rather not install Gnome. https://help.ubuntu.com/stable/ubuntu-help/display-brightness.html.en – EODCraft Staff May 14 '18 at 10:26
  • Ubuntu 18.04 comes with Gnome as a default Desktop environment, I didn't install any additional packages, it was working from the beginning without I add anything. – singrium May 14 '18 at 10:27
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    Ahhh, It says this at the beginning...."Depending on your hardware, you can change the brightness of your screen to save power or to make the screen more readable in bright light." – EODCraft Staff May 14 '18 at 10:28
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    Aha, so it all depends on the hardware! – singrium May 14 '18 at 10:29
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    But it does not make sense, I was able to see the brightness controls in 17.10, I don't think that my 1 year old laptop is suddenly deprecated – akxer May 14 '18 at 10:46
  • Try this : install xbacklight and add it to startup applications – singrium May 14 '18 at 10:51
  • This at least gave me a way to control brightness, but still does not solve the issue – akxer May 14 '18 at 10:56

3 Answers3

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I took a moment searching the problem in the internet, one of the proposed solutions : 

sudo add-apt-repository ppa:apandada1/brightness-controller
sudo apt update
sudo apt install brightness-controller

Normally, after this, you will have the brightness controller. You can find it under Settings>Power menu or search it in Dash.

singrium
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  • Nah, didn't work, but now I have a good application which allows me to change brightness for multiple monitors, huge help, but sadly not the solution I was looking for – akxer May 14 '18 at 11:08
  • So please mention it in an answer or a comment. – singrium May 14 '18 at 11:10
  • Mention what? I just want the brightness control bar to show up as it did in 17.10 for me – akxer May 14 '18 at 11:15
  • I mean mention the name of the application. – singrium May 14 '18 at 11:18
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    Wait I think I did not convey the message properly. I meant that the application you suggested brightness-controller is a good one. Helped me – akxer May 14 '18 at 11:19
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    works well! is there a way to associate the keyboard keys for brightness ? this is my last step to achieve a fully functional ubuntu on a apple hardware! – meduz Dec 09 '20 at 08:51
  • On a non apple computer brightness settings would be in the Fxx keys (F11, F12 for example). However I have no idea how to add that on apple hardware. – singrium Dec 09 '20 at 08:58
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This was fixed in a recent update. I am not sure which package was updated to fix this. So yeah I'm closing this question

akxer
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0

I end up using xlight in my Laptop:

sudo apt-get install xbacklight

Set Brightness from 0 to 100:

xbacklight -set 50

Dectrease or Incrase brighness:

xbacklight -dec 10
xbacklight -inc 10

Hitesh Sahu
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