The code in plymouth-stop hasn't changed since December 2010, and the plymouth package itself is unchanged since natty. So this seems to be due to a change elsewhere in the system (possibly grub?).
Do you see the Ubuntu splash screen on boot? One simple reason for this job to exit with status 1 is if plymouth is not running.
Thanks for the report.
The code in plymouth-stop hasn't changed since December 2010, and the plymouth package itself is unchanged since natty. So this seems to be due to a change elsewhere in the system (possibly grub?).
Do you see the Ubuntu splash screen on boot? One simple reason for this job to exit with status 1 is if plymouth is not running.