Como configurar o brilho do monitor normalmente no momento da inicialização?

Question

Eu tenho usado um loop que contém xrandr --output VGA1 --brightness 0.3 em um script bash que será executado automaticamente logo após o login por gnome-session-properties (aplicativos de inicialização).

Existe algum arquivo de configuração que possa controlar o brilho do monitor enquanto um monitor se conecta ao servidor X? Em resumo, como definir o brilho do monitor no momento da inicialização?

    

Answer 1

Copiado do Manual do Ubuntu do Ji m :

Open your file browser and navigate to “Computer-> sys -> class -> backlight” directory. You’ll see two or three folders there:

In each folder there’s a file called actual_brightness, you can see its content (brightness value) through the thumbnail icon.

Remember them and do:

Change your screen brightness through Fn + Arrow key.

Check out the actual_brightness files in each folder (Re-open each folder to refresh the value).

Does the value change?

Remember the folder name in which the value of actual_brightness changes. Replace acpi_video0 in below commands with that folder name

1. Press Ctrl+Alt+T on keyboard to open the terminal. When it opens, run the command below will give you the maximum level of your laptop backlight:

   cat /sys/class/backlight/acpi_video0/max_brightness
   

   Mine is 9, so I can set backlight level from 0 to 9.

2. Run the command below one by one. You’ll get the super user privilege and open the /etc/rc.local file, a script executed at the end of each multiuser runlevel, with gedit editor.

   sudo -i
   gedit /etc/rc.local
   

   Add the line below before the last. Change the number 0 to the brightness level you want.

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