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I have been searching through the Ask Ubuntu and Elementry OS Forums and there is nothing about getting this issue fixed. When I Hold Function and Press up and down the Brightness slider moves but there is nothing happening. Can someone please help me with this issue. I have added my Computer specs below.

Quad-Core Intel® Core™ i7-3520M CPU @ 2.90GHz 6.0 GB Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) NVIDIA Corporation GF108GLM [NVS 5200M] (rev a1)

Dell Latitude E6430

  • Please, open a terminal and post the output of ls /sys/class/backlight/intel_backlight/ – Maccer May 24 '17 at 9:52
  • actual_brightness brightness max_brightness subsystem uevent bl_power device power type – Mwebbs May 24 '17 at 22:07
  • Any Ideas? Still waiting to hear back? – Mwebbs May 26 '17 at 23:54
  • Check the value of max_brightness. Then you can set your brightness with any value between 0-max_brightness. To change brightness execute on terminal sudo echo XX> /sys/class/backlight/intel_backlight/actual_brightness , where XX is the number you want. If that doesn't work, try the same command with brightness instead. – Maccer Jun 7 '17 at 13:11

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