I have Ubuntu Studio with its version 5 of Ardour[Ardour 5.12.0 "Working Backwards" (rev 1:5.12.0-3)], but none of the plugins shows it. I read in a forum to find a checkbox in GUI configuration, but there isn't any GUI in the configuration. Is there any limitation in Ardour 5 that comes installed on Ubuntu Studio?
I don't remember what forum I found the checkbox mentioned, but it is also mentioned in this Ardour's manual link: http://manual.ardour.org/working-with-plugins/working-with-ardour-built-plugin-editors/ (Right in the first phrases in "generic plugin editor" instructions)