Save screen brightness for the Ubuntu 12.04 laptop

Open a terminal, enter the command:

$ sudo gedit /etc/default/grub

Find code like this:


Modify this code to


Update GRUB

$ sudo update-grub

Set initial value of brightness

$ sudo gedit /etc/rc.local

Add this code before exit 0:

$ sudo echo 0 > /sys/class/backlight/acpi_video0/brightness

0-10, which corresponds to 0 to 100%, echo 5 means that half of the luminance. Save the file and exit, restart your computer.

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