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Thread: My GNOME 3.28.2 Is Missing Monitor Brightness Control

  1. #1
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    Oct 2019
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    My GNOME 3.28.2 Is Missing Monitor Brightness Control

    Dear All,

    I recently installed Ubuntu 18.04 that came with GNOME 3.28.2 as the GUI. I have desktop PC with an AMD® Ryzen 5 2400g processor; graphics: AMD® Raven; 64-bit; 250 GB SSD. Weirdly there is no brightness control anywhere to be found neither in the Launcher nor in the Screen Display Settings. I'm currently controlling the brightness through the following command:

    $ xrandr --output "my-monitor-name" --brightness "number_from_0_to_1"

    From what I've seen there should be a slider control below the volume control in the Launcher. Ubuntu seems to be up to date and the Livepatch is ON. I would appreciate your help with this matter very much!

    Sincerely,
    Michael

  2. #2
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    Re: My GNOME 3.28.2 Is Missing Monitor Brightness Control

    External monitor?
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  3. #3
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    Re: My GNOME 3.28.2 Is Missing Monitor Brightness Control

    Yes, an LG monitor connected via HDMI.

    Mike

  4. #4
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    Re: My GNOME 3.28.2 Is Missing Monitor Brightness Control

    Yeah, external monitors rarely, if ever, get the brightness controls in System settings.
    On non-laptops I've never seen them.
    You might look at this
    https://launchpad.net/~apandada1/+ar...ess-controller
    Should still work.
    Splat Double Splat Triple Splat
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    Don't mind me, I'm only passing through.
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  5. #5
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    Re: My GNOME 3.28.2 Is Missing Monitor Brightness Control

    Your brightness control should be in the menu of the monitor.

  6. #6
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    Re: My GNOME 3.28.2 Is Missing Monitor Brightness Control

    Hi,

    It's been so long since I'd worked on a desktop PC that I found it weird not to be able to control brightness through the operating system. Deadflowr, thanks for the link I'm going to look into this!

    Mike

  7. #7
    Join Date
    Dec 2014
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    Re: My GNOME 3.28.2 Is Missing Monitor Brightness Control

    Another tool that might be helpful is ddccontrol and it's GUI gddccontrol. It uses DDC/CI (Display Data Channel/Command Interface), a protocol that gives access to most of the controls in the OSD-menu of a display. While xrandr and tools based on it change the image that gets send to the display to control brightness, color balance and the like, ddccontrol actually changes the settings of the display.

    Holger

  8. #8
    Join Date
    Oct 2019
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    Re: My GNOME 3.28.2 Is Missing Monitor Brightness Control

    Thanks Holger_Gehrke, I'll also look into this.

    Mike

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