The brightness control in the settings does not work. I have an Intel® HD Graphics 4000 (on a i5-3570K Processor) and run Ubuntu 14.04.03.

I followed the instruction given in https://wiki.ubuntu.com/Kernel/Debugging/Backlight for Intel HD, which is to create a file /usr/share/X11/xorg.conf.d/80-backlight.conf with

Section "Device"
    Identifier  "Intel Graphics"
    Driver      "intel"
    Option      "AccelMethod"     "sna"
    Option      "Backlight"       "intel_backlight" # use your backlight that works here
    BusID       "PCI:0:2:0"

After a reboot it still does not work.

Also, I get

$ ls /sys/class/backlight/

Am I not supposed to get some Intel stuff instead?

From other instruction found in https://askubuntu.com/a/481501/481818 I added

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash video.use_native_backlight=1"

to /etc/default/grub,


sudo update-grub

and reboot, but still no brightness control.

Anybody can help?

1 Answer 1


Try this solution.. This solution works for most of the people http://itsfoss.com/fix-brightness-ubuntu-1310/

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