As your may know, every time Ubuntu boots up you get the maximum level of screen brightness on laptop. Here’s a way to save your brightness by adding a startup script which will automatically adjust screen brightness when Ubuntu boots up.
- Save your screen brightness in Ubuntu 13.10
To get started, press Ctrl+Alt+T on your keyboard to open terminal. When it opens, run commands below:
It outputs the maximum level of your laptop backlight. Mine is 9. The minimum is 0.
Run command below to edit the
/etc/rc.local file, which is a script executed at the end of each multiuser runlevel.
sudo gedit /etc/rc.local
Add following before the last line. Change 0 to the brightness level as you want (from 0 to the max)
echo 0 > /sys/class/backlight/acpi_video0/brightness
thanks, it works :)
No such file or directory: cat /sys/class/backlight/acpi_video0/max_brightness
Please advice to here and notify my email. thanks
# echo 100 > /sys/devices/virtual/backlight/nvidia_backlight/brightness
Note: Must be with root user, sudo does not work.
Mackbook Pro [Mid 2009] [Nvidia 9400 – 256MB] [Ubuntu 13.10]
If your user is not root you may do once in a terminal:
sudo chmod 777 /sys/devices/virtual/backlight/nvidia_backlight/brightness
after that the line in rc.local should work.
Thanks, Ji m, it works perfectly.
Thanks, it works in 12.04
This worked for me on Ubuntu 14.04! Thanks man!~
Thanks, Ji m, it works, i was looking for that for a long time.
It worked on asus x55A with ubuntu 12.04.
I must have something set up wrong in my Ubuntu 14.04. It didn’t work for me.
is it same for the keyboard backlight ?
echo ‘0’ > /sys/class/leds/asus\:\:kbd_backlight/brightness