I have dual-booted my Macbook Pro with Ubuntu 12.04 . Whenever i log-in to Ubuntu, it does so with full screen brightness and keyboard backlight at full . How do i get rid of this? How can i tweak the start-up setting for screen brightness and disable keyboard backlight at start-up?
On my 11.2 MacBook Pro running Ubuntu 13.10, I got satisfactory results with this command, which makes an upstart task to dim them upon starting the login screen:
sudo cat > /etc/init/mbp-save-battery.conf << EOF description "Lower screen and keyboard backlight brightness on boot" task start on login-session-start script # lower screen brightness echo "35" > /sys/class/backlight/acpi_video0/brightness # Somebody else turns on the keyboard backlight # Wait for them before turning it off. sleep 1 echo "0" > /sys/class/leds/smc\:\:kbd_backlight/brightness end script EOF
The sleep for the keyboard backlight control is not ideal, but it has worked every time for me.
Keyboard backlight is only partially implemented, I think. It's working for unity, but in KDE there's no UI for it. You can manually change the keyboard backlight brightness on the command line. I don't have a mac, so I'm not sure what the exact command is, but for my samsung, the command is
echo 5 > /sys/class/leds/samsung\:\:kbd_backlight/brightness
(you have to do this as root, you can use
For the mac, have a look in
/sys/class/leds, and see what's there.
Has been a long time that you asked this question. I had a similar problem and solved it this way:
I believe I can help you with the screen brightness. I've posted what worked from me as an answer to a similar question on Ask Ubuntu.