[Bug 1019347] Re: A message: "mount: / is busy" appears every time shutting down or rebooting.

[Juan Pablo Baserga]

Hi,
taking advice from other threads, I added an ps and lsof commands to the umountroot script just before the root remount command. The result is attached. As you can see the only non-kernel/init programs running are rc, S60umountroot and plymouthd. Thou I couldn't find in the lsof which is the open file that makes / busy, I agree that plymouthd shouldn't be running at this stage.

Hope this helps with debugging. My system is not clean install, upgraded
several times, maybe this is the source of the problem.

Best regards,

Juan Pablo

** Attachment added: "DEBUG"
   https://bugs.launchpad.net/ubuntu/+source/upstart/+bug/1019347/+attachment/3262949/+files/DEBUG

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https://bugs.launchpad.net/bugs/1019347

Title:
  A message: "mount: / is busy" appears every time shutting down or
  rebooting.

Status in “upstart” package in Ubuntu:
  Confirmed

Bug description:
  I arrived here from bug 963106
  [https://bugs.launchpad.net/bugs/963106]. I thought that it was a
  problem with network-manager, but it was not.

  I was suggested that it is probably a problem with upstart : "that
  modemmanager simply hasn't had time to complete the shutdown process
  before umountroot is run. Since modemmanager is an upstart job,
  sendsigs doesn't kill it."

  lsb_release -rd:
       Description:	Ubuntu 12.04 LTS
       Release:	        12.04

  apt-cache policy upstart:
     upstart:
    Installed: 1.5-0ubuntu7
    Candidate: 1.5-0ubuntu7
    Version table:
   *** 1.5-0ubuntu7 0
          500 http://kambing.ui.ac.id/ubuntu/ precise-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       1.5-0ubuntu5 0
          500 http://kambing.ui.ac.id/ubuntu/ precise/main amd64 Packages

  Hope this will be fixed. Thanks.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: upstart 1.5-0ubuntu7
  ProcVersionSignature: Ubuntu 3.2.0-26.41-generic 3.2.19
  Uname: Linux 3.2.0-26-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.0.1-0ubuntu8
  Architecture: amd64
  Date: Sat Jun 30 00:08:18 2012
  InstallationMedia: Custom Live CD - Release amd64
  SourcePackage: upstart
  UpgradeStatus: No upgrade log present (probably fresh install)

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