[Bug 554172] Re: system services not starting at boot

[Phil Went]

Scott,

I've done some investigation based on the hypothesis that this bug is
> caused by open("/dev/console") returning the EIO error, this is
> supported by comments including this log message from Upstart and by
> evidence that removing "console output" from Upstart jobs appears to
> correct the problem.
>

Not sure if this is relevant, but the workaround of commenting out the
/dev/console statements may _seem_ to be a fix, but it is not as I have seen
the bug reproduced with this workaround applied, albeit less frequently.

It does remove the console write error from the log, but some services may
still not run. No obvious signs of failure does not mean there has been no
failure, as I have found machines that seem OK but it is not obvious as they
have a small number of services. From memory, there is also an option to
turn off the console.

I tried each workaround individually with multiple reboots until failure,
including the disabling of ureadahead. The only workaround that I have not
seen the bug is after disabling ureadahead, but this may mean nothing given
the intermittent nature of the bug.

-- 
system services not starting at boot
https://bugs.launchpad.net/bugs/554172
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