Issue
I installed Ubuntu 20.04.1 LTS on my MacBook Pro 15" Mid 2014. As many others, I can not get the brightness adjustment to work. Whenever I press the corresponding keys F1
, F2
the brightness adjustment does pop up and reacts, but the actual brightness of the screen always stays on max (I presume, something very bright) and does not change.
It is a fresh install and it does have a NVIDIA GeForce 750M Mac Edition.
Not working Solutions
So far I have tried manually adjusting the brightness via
echo 4 | sudo tee /sys/class/backlight/acpi_video0/brightness
which did not work.
I have also tried adding
setpci -v -H1 -s 00:01.00 BRIDGE_CONTROL=0
to /etc/rs.local
as suggested here after creating rs.local
, because it wasn't present in the first place.
Lastly I tried adding
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 750M Mac Edition"
Option "RegistryDwords" "EnableBrightnessControl=1"
EndSection
to /usr/share/X11/xorg.conf.d/10-nvidia-brightness.conf
as was suggested in this question.
None of those solutions have worked for me, but I also haven't find any working solutions for my particular GPU or an Ubuntu Version above 20.
I am quite new to Linux in general and also this forum. Therefore I apologize in advance should there be some easy fix or whether I have overlooked one of many questions with the correct solution.