only trigger display callback if display exists
only trigger display callback if display exists

a-morales/kwm,akdor1154/kwm,akdor1154/kwm,koekeishiya/kwm,cHoco/kwm,akdor1154/kwm,koekeishiya/kwm,cHoco/kwm,cHoco/kwm,a-morales/kwm,koekeishiya/kwm,a-morales/kwm