Comment 7 for bug 1773515

"Does anything happen if you run:

sudo dpkg --configure -a"

Absolutely nothing. As I said I have manually removed the files, if that may affect it.

Worth noting I run Ubuntu Studio, not vanilla Ubuntu or even Xubuntu, and sometimes configuration steps may get missed by that team (eg Xubuntu is apparently back with the Synaptics pointer driver due to issues but coming from Studio I had to manually do the change to get the touchpad working properly again.) So it's possible everything is fine in the main Ubuntu version.