How to decrease the brightness in Samsung RV509?

Question

I'm using a Samsung RV509 laptop with Ubuntu 12.04 LTS.

Can anyone help me to decrease the brightness in my laptop?

Answer 1

On laptops, you will often be able to adjust brightness, by pressing the FN button, and a specific F1 - F12 at the same time. Take a look at your F1 - F12 buttons. There should be small icons with a blue color on. If some of them look like they could be related to brightness, try it with the FN button. Sometimes it is also arrow keys and other buttons you will need to use.

If your keyboard looks like this, you can adjust your brightness by using the FN key and the UP and Down arrow keys. Your volume can be adjusted with FN+Arrow key Left or right, and so forth.

Good luck.

Answer 2

Try using xbacklight.

• Install it by running sudo apt-get install xbacklight in a terminal.
• Change brightness by xbacklight -set <level>, where <level> is an integer ranging from 0 to 100 (lowest brightness to highest).

For example, to set medium brightness one would use

xbacklight -set 50

Answer 3

first know the output name

xrandr -q

for example my output name is DVI-I-2

The brightness can be changed like this:

xrandr --output DVI-I-2 --brightness 1

Answer 4

If the options that are built into your keyboard give you trouble, which is often the case, you can use xbacklight. If not already installed, you can install it via the terminal with:

 sudo apt-get install xbacklight

you can then change the backlight:

xbacklight -set [percent]

where the [percent] is a value between 0 and 100, i.e.:

xbacklight -set 50

would set the backlight to 50% of the max value.

if you want keyboard shortcuts for increasing and decreasing the backlight, you could assign

xbacklight -inc 10

and

xbacklight -dec 10

to whichever keybindings you'd like, using the "keyboard" menu and the "shortcuts" tab. These would then increase the backlight by 10%, and decrease it by 10%, respectively.

Hope this helps.