• \*\*SOLVED\*\*contrast setting does not work


    I wonder if anybody can help me…on my dell inspiron 15 with gnome installation fiddling with contrast settings does not change the actual levels at all i.e. slider and Fn F4-F5 works but nothing happens can anybody point me in the right direction…

    thanks

  • I wonder if anybody can help me…on my dell inspiron 15 with gnome installation fiddling with contrast settings does not change the actual levels at all i.e. slider and Fn F4-F5 works but nothing happens can anybody point me in the right direction…

    thanks

  • HI,

    What’s the full model number of your inspiron? Have you tried the suggestions from the wiki?

    [https://wiki.archlinux.org/index.php/backlight][0]">[https://wiki.archlinux.org/index.php/backlight][1]

    Best Regards,
    Dustin

    [0]: <a href=
    [1]: https://wiki.archlinux.org/index.php/backlight

  • thanks

    wiki finally helped after I re-read a section

    acpi was overwriting my own native backlight control

    "Kernel command-line options
    Sometimes, ACPI does not work well due to different motherboard implementations and ACPI quirks. This includes some laptops with dual graphics (e.g. Nvidia/Radeon dedicated GPU with Intel/AMD integrated GPU). On Nvidia Optimus laptops, the kernel parameter nomodeset can interfere with the ability to adjust the backlight. Additionally, ACPI sometimes register its own acpi_video0 backlight even if one already exists (such as intel_backlight), which results in non working backlight keys. You can try adding the following kernel parameters in your bootloader(grub, syslinux…) to stop ACPI from registering its own backlight interface if one already exists:

    video.use_native_backlight=1" I had to add this as a kernel parameter and bam it finally works

  • Glad you solved it!

    Cheers!

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