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I recently switched from Windows 10 to Ubuntu 16.04 and have been doing okay so far. One of my problems, though, is that I have to go to system settings to switch the brightness of the screen. I have looked up many solutions, but I'm not sure which one is the simplest, hopefully someone can teach me a way to have a keyboard shortcut for this.

I have an Asus Zenbook UX303L (not sure if matters).

I have tried editing in the grub GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" to:

  • GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi="
  • GRUB_CMDLINE_LINUX_DEFAULT="splash quiet acpi_osi='!Windows 2012'"
  • GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux"

To no success, this actually makes me unable to change the brightness through system settings.

mickmackusa
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pggodoy
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2 Answers2

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This is unrelated to your GRUB issue, but it does solve your having to go into the settings to change the brightness problem.

I did a Google search related to your topic and found this page:

http://www.omgubuntu.co.uk/2013/04/brightness-control-ubuntu

After installing this and testing it myself, less the keyboard feature, I can say it does work, minus a few quirks. (Scroll wheeling the icon messed the program up for me)

If you do not know how to install PPAs, you do it by opening up Settings, hitting Software & Updates, clicking Other Software, and clicking Add.

To install packages, you can either use apt-get or my preferred method, Synaptic.

keyboard4238
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I was having the same problem with the brightness on my Gateway laptop (with integrated Intel graphics) and found this answer.

Instead of modifying the acpi_osi= value, what worked for me was to add acpi_backlight=vendor to the end of that command in "/etc/default/grub"

I had previously added acpi_osi=Linux to that line to solve the same issue in a previous version of Ubuntu (before upgrading to 16.04 LTS), so my full (working) line reads like this:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"

Of course, after editing that file, it's necessary to save the changes, then run sudo update-grub and restart.

After doing this, my keyboard shortcuts for brightness are working again.

Community
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TheDavidJohnson
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