I have my laptop set to maximum brightness, but it's not bright enough. Is it possible to somehow make it brighter?

  • 1
    Check this topic, maybe it will help: askubuntu.com/questions/62249/…
    – GreggD
    Commented May 16, 2016 at 10:38
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    not sure if this helps, but xrandr --output <screen_name> --brightness 1.1 does that, but the screen usually looks ugly then. Retrieve <screen_name> from the output of xrandr. Commented May 16, 2016 at 10:38

2 Answers 2


Run this to see a list of your outputs. You're looking for the one that is "connected":

xrandr --current

Here's a screenshot of my list. The output I want is the "connected" eDP1 at the top:

Now you can run these commands to make adjustments. Replace eDP1 with the name of your output, and change 1.2 to make the adjustments:

xrandr --output eDP1 --brightness 1.2
# Note: 1 is default

You can also use gamma instead of brightness:

xrandr --output <outputname> --gamma 0.5:1.0:1.0
# Note: 1.0:1.0:1.0 is default
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    You should not add other information in the middle of your code, it breaks the code and when people copy it, it simply won't work. I have edited it but be careful not to break your code.
    – Mark Kirby
    Commented May 16, 2016 at 11:53
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    @MarkKirby Thanks for pointing out that mistake. I will make sure not to do that again.
    – Hizqeel
    Commented May 16, 2016 at 11:56
  • @Hizqeel, I get the following: userone@laptop:~$ xrandr --output DVI-0 --brightness 2 warning: output DVI-0 not found; ignoring xrandr: Need crtc to set gamma on. userone@laptop:~$ Commented May 17, 2016 at 9:39
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    @oshirowanen you obviously didn't read the comment to your question. DVI-0 is not the name of your screen. Commented May 17, 2016 at 10:44
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    @oshirowanen I have updated the answer. If this is clear and solves your problem then let me know.
    – Hizqeel
    Commented May 17, 2016 at 10:45

use both of them

xrandr |grep " connected" |cut -f1 -d " "

get the name that listed and use it instead of eDP-1

 xrandr --output eDP-1 --brightness 1.4

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