Controlling the brightness of your screen not working after installing Ubuntu on a laptop equipped with an Intel graphics card?
You can solve that through the Xorg configuration.
First, look at your PCI bus, in order to identify your card:
$ lspci | grep -i vga 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
That's how it looks on my machine. I am interested in the Intel card, so I need to remember its bus id 00:02.0.
Next you need to create the config file:
and put the following content in, which will tell the xorg driver to use intel_backlight:
Section "Device" Identifier "card0" Driver "intel" Option "Backlight" "intel_backlight" BusID "PCI:0:2:0" EndSection
Please note that the BusID should match.
Save, restart your Xorg:
- find which display manager your ubuntu is having with following command:
- and, for Ubuntu with LightDM:
It should then work.