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Thread: Adjust Display Brightness with Intel HD 630?

  1. #1
    Join Date
    Jul 2005
    Location
    DD / Germany
    Beans
    113
    Distro
    Ubuntu Development Release

    Adjust Display Brightness with Intel HD 630?

    Hi all,

    I'm running Ubuntu 16.04 on an Intel 7700k based Desktop PC with a 26" LG Flatron display connected via DVI. The display is roughly 10 years old and gives me a nasty loud hum when set at brightness levels lower than 100% - which in turn will require cat 4 sunglasses to work with. Therefore, I've been trying to adjust display brightness using Ubuntu Brightness/Lock, but changing the slider has no effect.

    Code:
    $ ls /sys/class/backlight/
    $ acpi_video0
    Indicates intel_backlight is not recognised as expected. I've added

    Code:
    acpi_osi=Linux acpi_backlight=vendor
    to the kernel boot options, but that resulted in the brightness slider disappearing completely and ls /sys/class/backlight/ returning NULL.

    Creating a /usr/share/X11/xorg.conf.d/20-intel.conf with

    Code:
    Section "Device"
            Identifier  "card0"
            Driver      "intel"
            Option      "Backlight"  "acpi_video0"
            BusID       "PCI:0:2:0"
    EndSection
    did not solve the issue either.


    Any suggestions?


    Cheers,
    roots
    Last edited by roots; 2 Weeks Ago at 09:48 AM.

  2. #2
    Join Date
    Feb 2018
    Beans
    1

    Re: Adjust Display Brightness with Intel HD 630?

    I got the same problem. My laptop is HP Probook 450 G4 using Intel HD 620. And even when I check
    $ ls /sys/class/backlight/
    It returns nothing which means that there's nothing in this folder.

    I tried all above suggestions but nothing worked.

    Can any one help me?

  3. #3
    Join Date
    Feb 2008
    Location
    Texas
    Beans
    23,324
    Distro
    Ubuntu 17.10 Artful Aardvark

    Re: Adjust Display Brightness with Intel HD 630?

    Hi minhkstn, please start your own thread and do not hijack someone else's, you both will get better help in separate threads.

    Thanks

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