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I installed ubuntu 18.04 on my dell XPS laptop but for some reason the screen brightness buttons don't work.

My laptop model is XPS 15 7590 with a NVIDIA(R) GeForce(R) GTX 1650 4GB GDDR5 video card.

I have found a solution by executing the "xrandr --output eDP -1 --brightness ". But this is a bit too hacky for me and not practical.

Does anyone have any workarounds for this?

Thanks -N

newbuntu
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    There are many models of XPS laptops. Please browse to https://www.dell.com/support/home/us/en/04?app=products and provide Dell the information so their website can identify which you have, then return here with that Model Part Number, click [edit], and add it to your question. – K7AAY Mar 04 '20 at 21:54
  • @K7AAY, added that info as you requested, thx. – newbuntu Mar 04 '20 at 22:03
  • Have you tried xbacklight? See https://askubuntu.com/a/149265/832813. – Quasímodo Mar 04 '20 at 22:48
  • @Quasímodo, I tried and didn't work and people are suggesting using xrandr command which as I stated does work. But all these solutions are command line and quite hacky. How can I control the brightness via the OS UI elements designed for this purpose? – newbuntu Mar 05 '20 at 20:02
  • Sometimes the piece of software responsible for making it available through UI won't find the way to change brightness, as is your case.
  • xrandr does not change brightness on hardware level https://askubuntu.com/a/189308/832813.
  • Try the method described here https://unix.stackexchange.com/a/485263 to really change your brightness. If it works and you have trouble converting that into a more convenient UI solution, I suggest researching and then, if necessary, opening a question.
    • – Quasímodo Mar 05 '20 at 21:37