Exciting news: I didn't know that polkit was a package, so even if I followed ( https://www.qubes-os.org/doc/vm-sudo/ ) in detail, nothing worked.
Giving sudo dnf install polkit in the minimal template vm solves the authorization problems, both for sys-usb and sys-net. Now I am able to use the minimal template as the underlying one for sys-usb, but I still have problems with sys-net. sys-net keeps telling me that NetworkManager is not running. If I open up a terminal and give sudo NetworkManager then i can see the networks clicking on the wifi tray icon, but I can't connect. If I click on a network nothing happens (no error displayed, of any kind. Just nothing). Any suggestions? Cheers, Fab -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To post to this group, send email to firstname.lastname@example.org. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/5e1ebbf7-250c-46ac-b09d-41970235718e%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.