Ubuntu
gnome-settings-daemon package

  1. Bug #1028518
  2. Comment #2

Comment 2 for bug 1028518

Revision history for this message
Redsandro (redsandro) wrote :

For reference purposes, here's how to set that brightness in case of emergencies without the Fn keys:

Set the value of:
/sys/class/backlight/acpi_video0/brightness
to a value between 1 and max, where max is:
/sys/class/backlight/acpi_video0/max_brightness

Note that you can't just sudo echo it in there. (???) You'll need to pipe-feed it, e.g.:
echo 15 | sudo tee /sys/class/backlight/acpi_video0/brightness