As the title shows, the monitor of my laptop only works at max brightness under KDE. I have read many articles include the Arch wiki and configured some grub files, but none of them helped. Commands like inxi -G returns the following:
I have also tried xbacklight -set 50, it returned normally, but the actual brightness of the screen is not changed. I also tried echo 50 > /sys/class/backlight/nvidia_0/brightness, it also returned normally but without changing the brightness.
Please read this: How to provide good information
and press the three dots … below your post and press the to give us more information so we can see what’s really going on.
Now we know the symptom of the disease, but we need some more probing to know where the origin lies…
An inxi --admin --verbosity=7 --filter --no-host --width would be the minimum required information for us to be able to help you. (Personally Identifiable Information like serial numbers and MAC addresses will be filtered out by the above command)
Also, please copy-paste that output in-between 3 backticks ``` at the beginning and end of the code/text.
What is the output of:
cat /sys/class/backlight/nvidia_0/*
P.S. If you want to notify me that you did provide this information, please this message and I’ll come back and have another look.
P.P.S. If you enter a bit more details in your profile, we can also see which Desktop Environment you’re using, which exact CPU/GPU or Kernel, … you have without typing it every time