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Old 11-01-2019, 08:47 PM   #1
cmdywrtr27
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screen brightness in linux deepin


hi, i hope i am in the right forum. i am new to linux so don't have the best knowledge on how to fix things but i am having an issue with my screen brightness. the fn plus f12 buttons show the screen at maximum brightness but it is incredibly hard to see. when i plug in an extra monitor through hdmi, that screen brightness is great but on my laptop it is almost impossible to see. is this a known issue or is there a fix for this?

any help is greatly appreciated.
 
Old 11-05-2019, 07:17 AM   #2
CyDFect
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The screen brightness information is usually stored in /sys/class/backlight, for me on a Thinkpad x200 it's /sys/class/backlight/intel_backlight/brightness. If you want to change the brightness without installing any external program you should look around in there, there should be a max_brightness file too.

The easiest method though is using xbacklight (you might have to install it). You can use it to change the screen brightness with
Code:
xbacklight -set <0-100>
 
Old 11-05-2019, 12:51 PM   #3
ondoho
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Quote:
Originally Posted by CyDFect View Post
The screen brightness information is usually stored in /sys/class/backlight, for me on a Thinkpad x200 it's /sys/class/backlight/intel_backlight/brightness. If you want to change the brightness without installing any external program you should look around in there, there should be a max_brightness file too.
In other words: assuming the number in the max_brightness file is 100, you should be able to do the following:
Code:
$ sudo -i
# echo 100 > /sys/class/backlight/intel_backlight/brightness
Quote:
The easiest method though is using xbacklight (you might have to install it). You can use it to change the screen brightness with
Code:
xbacklight -set <0-100>
I heard somewhere that xbacklight does not always work; you could try light instead.
 
  


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