My config is the following: - Ubuntu 14.04 - An ASUS laptop - An additional LCD screen connected through VGA
I control my additional LCD screen's brightness with dedicated controls located directly on the screen, so that's not a problem.
For my laptop screen, I can use the shortcuts on my keyboard, and I also install the brightness indicator to control this with my mouse.
My problem is the following:
- set laptop brightness to the minimum using either keyboard shortcuts or brightness indicator
- lock the computer using
- go for lunch :)
- wake up the computer and unlock it → the laptop screen brightness is high and needs to be re-adjusted
Could it be possible to fix the brightness to a given value all the time?
Under "brightness and lock" in the system settings, I unchecked "Dim screen to save power" in order to avoid automatic changes in the screen brightness, but it doesn't help.
I also tried to directly echo a value in
/sys/class/backlight/intel_backlight as seen in other topics, but even in
sudo it says I don't have the permissions to do that...
Thanks in advance for your help!