Bioinformatics Analyst at Seven Bridges & PhD Student at METU

Save Brightness Settings Ubuntu 12.04 LTS

If your laptop starts with minimized or maximized brightness and you want to have a fixed default value for that do following:

Run terminal and type to get maximum brightness:

cat /sys/class/backlight/acpi_video0/max_brightness

Now set the brightness as you want and run following which give you the value for current setting:

cat /sys/class/backlight/acpi_video0/brightness

Edit /etc/rc.local to have that value as default after each reboot / start:

sudo gedit /etc/rc.local

Add this line before exit 0:

echo YOUR_VALUE > /sys/class/backlight/acpi_video0/brightness

Save /etc/rc.local

Now, the problem should be solved