@startuml
title "UCM sequence boot order (using udev and alsactl)"

start
:Sound card detected (udev);
:UCM: FixedBootSequence;
if (Card state (/var/lib/alsa/asound.state)) then (not present)
  :UCM: BootSequence;
else (present)
  :alsactl: Restore state (from asound.state);
endif
:Standard sound card use (with or without UCM);
:Save sound card state (asound.state);
:Sound card detached;
stop

@enduml