It is very similar to this bug. I am posting a link here since there may be more useful information there.
To summarize what I observe in both bugs:
-services sometimes do not start on boot. irqbalance, winbindd, cupsd are the major ones. runlevel command will report 'unknown'
-on some boots, all services will start ok. runlevel command will report 'N 2'
-if you think you have it fixed, boot 10 times at least to see if you can get it to fail.
-if you have a bad boot, 'sudo start rc-sysinit' seems to start the services that did not start.
https:/ /bugs.launchpad .net/ubuntu/ +source/ upstart/ +bug/554172? comments= all <--- This bug was initially classified as a CUPS bug, but it has been moved to an Upstart bug.
It is very similar to this bug. I am posting a link here since there may be more useful information there.
To summarize what I observe in both bugs:
-services sometimes do not start on boot. irqbalance, winbindd, cupsd are the major ones. runlevel command will report 'unknown'
-on some boots, all services will start ok. runlevel command will report 'N 2'
-if you think you have it fixed, boot 10 times at least to see if you can get it to fail.
-if you have a bad boot, 'sudo start rc-sysinit' seems to start the services that did not start.