before all is right and i upgrade to ubuntustudio 18.10 and then !
i can’t no more connect my controller ?
before i start jack and after ardour
now i must start ardour in first and ardour start jack
after i chose midi pilote on jack stop it restart it
and when wont affect a parameter to a knob that don’t work?
have you a solution ?
i am very sorry for mine bad english 
thank you for your help