Other users has a same problem. See:
https://askubuntu.com/questions/906723/fn-media-keys-slow-delayed-on-ubuntu-gnome-17-04
This problem appears on Ubuntu 17.04, 18.04 and 20.04.
Other users has a same problem. See:
https:/ /askubuntu. com/questions/ 906723/ fn-media- keys-slow- delayed- on-ubuntu- gnome-17- 04
This problem appears on Ubuntu 17.04, 18.04 and 20.04.