How did you install xdm and how have you configured it for use? The xdm package in Ubuntu should trigger a 'starting xdm' signal that terminates plymouth via /etc/init/plymouth-stop.conf.
How did you install xdm and how have you configured it for use? The xdm package in Ubuntu should trigger a 'starting xdm' signal that terminates plymouth via /etc/init/ plymouth- stop.conf.