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Brightness should be controlled by pressing Fn + F5 and Fn + F6. Nothing happens when I press these keys. My computer is a Asus X551MAV­-SX366GB and I'm using Lubuntu 14.04

snoop
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Carsten
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1 Answers1

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Here is the summary of what I did:

  1. I created the file /usr/share/X11/xorg.conf.d/20-intel.conf as described here 13.10 Can't Adjust Dell Laptop Backlight:

    Section "Device"
     Identifier  "card0"
     Driver      "intel"
     Option      "Backlight"  "intel_backlight"
     BusID       "PCI:0:2:0"
EndSection

  2. Then I changed one line in/etc/default/grub so it looked like this: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=" and ransudo update-grub` from the command line.

  3. Install xbacklight Install xbacklight if not already installed sudo apt-get install xbacklight. Then I put xbacklight -set 50 to autostart applications.

  4. Reboot

This worked for me.

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Carsten
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