Hey @Simon, I also installed 5.7 from mainline (https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.7/) but Brightness still not working for me.
I notice that adjusting the brightness using the keys or the mouse will change the number from 1 to 21 in this file: cat /sys/class/backlight/ideapad/brightness (but without any real impact on the screen brightness) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1881462 Title: Brightness settings don't work on Lenovo Ideapad 5 15ARE05 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1881462/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
