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    • [Deepin 20] Brightness Not Changing on Mid-2014 MacBook Pro
    Community Discussion 744 views · 1 replies ·
    Tofloor
    poster avatar
    m4salman
    deepin
    2020-04-21 14:04
    Author
    Having a technical issue.

    MacBook Pro (Retina, 15-inch, Mid 2014)

    The brightness is stuck on 100%, I tried changing the brightness using F1/F2 and I see the little icon pop-up showing that brightness setting is changing, however the brightness is stuck. I tried restarting the MacBook, booted into Mac, changed brightness to lower, then restarted again to boot into Deepin 20, and the brightness spikes back up to 100%.

    Any help would be much appreciated.


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    deepinuser17
    deepin
    2020-04-21 14:22
    #1
    Try adding a systemd service as follow:

    1. Create /usr/local/sbin/set_display_brightness.sh
    2. =======================================================================
    3. #!/bin/sh
    4. #
    5. # set display brightness to 400
    6. echo 400 > /sys/class/backlight/gmux_backlight/brightness
    7. =======================================================================

    9. Create /etc/systemd/system/set_display.service
    10. =======================================================================
    11. [Unit]
    12. Description=Set display brightness

    14. [Service]
    15. Type=oneshot
    16. ExecStart=/usr/local/sbin/set_display_brightness.sh

    18. [Install]
    19. WantedBy=multi-user.target
    20. =======================================================================

    22.    $ sudo systemctl daemon-reload
    23.    $ sudo systemctl enable set_display.service
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