Ubuntu
update-manager package

  1. Xenial (16.04)
  2. Bug #2068805
  3. Comment #6

Comment 6 for bug 2068805

Revision history for this message
Nathan Teodosio (nteodosio) wrote : Re: "Install Now" button disappears for good if all packages unselected

Can't reproduce, here the button is simply turned grey, do you see anything in the screen shot that is not there in your case?