Revision of Brightness in Trisquel-mini (lxde) for Samsung users from Tue, 12/10/2013 - 21:59
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If the brightness keys (Fn+F2 and Fn+F3) don't work, follow this tutorial.
Open up the terminal (Trisquel Menu -> Accessories -> Terminal) and install the xfce4-power-manager package:
sudo apt-get install xfce4-power-manager
After this, edit the file "autostart" by entering this command.
sudo nano /etc/xdg/lxsession/Trisquel-mini/autostart
Replace the line "@gnome-power-manager" with "@xfce4-power-manager" (without the quotes). Type Control-X to exit, press the Y key and then press enter to save the file.
Edit the grub bootloader configuration file:
sudo nano /etc/default/grub
change the line:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
to:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
Again, type Control-X to exit, press the Y key and then press enter to save the file.
Update the grub bootloader configuration:
sudo update-grub2
sudo reboot
Now the brightness keys should work.
