Just check your backlight directory and see if there's some other folder other than Intel's. I hope this solves your issue too, maybe this can be also useful for other manufacturer laptops other than Dell. My guess is that when I installed the script for the first time I was still using Intel drivers, and a later dell update must have forced its color management to override the previous one.

So, to solve the issue, just edit the line (inside 'icc-birghtness' script)īACKLIGHT_PATH = '/sys/class/backlight/intel_backlight'īACKLIGHT_PATH = '/sys/class/backlight/dell_backlight'Īlso, remember to do a cleanup after the changes:

I purchased Dell Inspiron 5558 with Windows 10 just two months ago Nov. Looking at the 'birghtness' and 'max_brightness' files inside the two folders I noticed that only the dell one was reacting to the change in screen brightness through system settings. obs brightness problem After that right click on the source to bring up a menu. However I noticed that my laptop had its own 'brightness folder', different from the intel one: The 'icc-brightness' python script gets os birghtness values from folder /sys/class/backlight/intel-backlight.

(I'm using Ubuntu 19.10 on the same 7590 Dell laptop, but I'm pretty sure this fix is valid for every os version). I was able to dim the screen brightness only few times before it suddenly stopped working. Hi, I had your same problem and I just managed to solve it.