A sort of workaround seems to be using the Studio Controls: https://help.ubuntu.com/community/UbuntuStudio/UbuntuStudioControls
And at the same time disabling compositing from Window Manager Tweaks. But in Ubuntu Studio 19.04 the it was OK to leave compositing on.
A sort of workaround seems to be using the Studio Controls: https:/ /help.ubuntu. com/community/ UbuntuStudio/ UbuntuStudioCon trols
And at the same time disabling compositing from Window Manager Tweaks. But in Ubuntu Studio 19.04 the it was OK to leave compositing on.