Before I was getting a laggy Gnome brightness indicator but no brightness changes happening.
Then I added 'options thinkpad_acpi brightness_enable=1' to /etc/modprobe.d/options and now I'm getting a non laggy Gnome brightness indicator but still no brightness changes actually taking place.
For me the opposite has happened;
Before I was getting a laggy Gnome brightness indicator but no brightness changes happening.
Then I added 'options thinkpad_acpi brightness_ enable= 1' to /etc/modprobe. d/options and now I'm getting a non laggy Gnome brightness indicator but still no brightness changes actually taking place.