I have recently updated thru kernels kernel-core-5.15.5-20[0,1].fc35.x86_64, and have had the main display in my laptop dim by 50%. Laptop hardware keys can only increase to approximately 70%. brightnessctl command won’t push the display any further either. I haven’t found anything on line, or in this forum that covers the topic with THIS release. I’m currently running kernel-core-5.14.18-300.fc35.x86_64 as it does not exhibit the problem. I’m new to the site as I haven’t had any issues with Fedora that haven’t been fixable w/o a little bit of research online.
Thank you very much!
You could check your maximum brightness by using
Then you could also change manually the brightness. First use
root user on terminal with
sudo su. Then change the value of brightness between 0 to the value you found on
max_brightness above. Let say your maximum brightness are 225 then after running
sudo su use
echo 100 > /sys/class/backlight/*/brightness.
* is arbitrary since for each system will have different directory depend of graphic card being used. On my system it
amdgpu_bl0. It should different since you are using Nvidia Quadro.
Beware not to change the value of
max_brightness since I believe the driver maintainer must be have the good reason to set a certain value on there to protect your hardware.
Thank you very much for your response, I checked out my /sys/class/backlight/*/brightness files – max is set to 100. I will
see if the values change when I boot to the more recent 5.15.5-200/1 kernels.
I will also look into installing the Nvidia drivers, as they are not currently installed.