I am also experiencing this bug and have also found a simple workaround.
The problem appears to be with elevation - ie the date and time settings
app fails to request it. Running from terminal the above quoted command
works if you ask for elevation. So:
$ sudo /usr/bin/indicator-datetime-prefer
*** This bug is a duplicate of bug 751175 ***
https://bugs.launchpad.net/bugs/751175
I am also experiencing a bug and have also found a workaround. The
problem appears to be with elevation - ie the date and time app fails to
request it. Running from terminal the above quoted command works if
