Hi everyone,
I am sorry, if there is a solution for my problem and I did not find it, but I tried a view an no one worked.
My keyboard shortcuts for brightness doesnt work. There is an icon showing by pressing buttons for high and low but nothing happened.
So, first I changed the entry in /etc/default/grub
from GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
to GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"
updated and restart, but nothing changed.
Then I tried the solution from here: Phyton-Code
I was surprised that even that did not work!
I controlled twice if I did a mistake, but I am sure, I didnt…
Maybe it has something to do with the laptop? I have a Presario CQ57, AMD-C50 CPU, 8GB RAM
I am using the 18.04 Beta, may that can be a reason?
Thanks for your answers!