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In a HP sleekbook 15 laptop I managed to install NVidia driver and also quick switch graphics is working. When NVidia card is active I can adjust the brightness using keyboard but when intel card is active the adjust is not possible. I have to mention that I have followed next advice "Edit /usr/share/X11/xorg.conf.d/20-intel.conf as root. Enter the following text:

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

          EndSection                "

but still doesnt work for intel graphic card.

Someone can help? Thank you!

Marius123
  • 65

1 Answers1

7

Edit the /etc/default/grub file

sudo gedit /etc/default/grub

or sudo nano /etc/default/grub

find this line:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

add acpi_backlight=vendor to the value so it looks like this:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"

then apply grub configs: sudo update-grub

and reboot

This worked for my HP ProBook.

Solution found here: http://www.techjail.net/solved-brightness-problem-in-ubuntu-12-04-precise-pangolin.html

Gtx
  • 211