[Bug 880240] Re: ubuntu 11.10 : the system doesn't turn off if "sudo halt" is given

[Sam Clark]

This happened to me just a few days ago. Yesterday, I reinstalled ubuntu and it worked for a while.  Today, however it's started again.  The actions that I took during my last login are two numerous to immediately pinpoint which one may have caused it, but the most likely candidate is that right before I tried to shutdown, I had just modified the fstab with the line:
/dev/sr0 /media/cdrom0   udf,iso9660  user,noauto,exec,utf8   0    0

i.e. I had just created a fixed mount point for my cd-rom drive to
better take advantage of wine.  I don't know if this has anything to do
with this problem though.

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https://bugs.launchpad.net/bugs/880240

Title:
  ubuntu 11.10 : the system doesn't turn off if "sudo halt" is given

Status in “upstart” package in Ubuntu:
  Confirmed

Bug description:
  Since I upgraded from 11.04 to 11.10 the system doesn't turn off at
  the end of halt procedure if it's called via commandline (local or
  remote shell) . At some point of halt procedure the system freezes and
  all I can do is turning off pc via physical power button and halting
  it using GUI or via "sudo shutdown -h now" , these two methods work
  flawlessly.

   I have this problem on both x86_64 and x86. Anyway if I shut down the
  pc using ligthdm or unity the system is turned off properly.

  Description:	Ubuntu 11.10
  Release:	11.10
  Linux travelmate 3.0.0-13-generic #21-Ubuntu SMP Mon Oct 17 20:18:09 UTC 2011 i686 i686 i386 GNU/Linux

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