[Bug 1170911] Re: "mount: / is busy" error during shutdown (not network-manager)

[David Matějček]

My experiments:
0) With 12.10 everything worked perfectly.
1) 13.04, upgraded from 12.10. Since then I cannot sleep, hibernate, or shutdown my computer. After some hard resets system starts without the X-server, sometimes with.
2) Uninstalled modem-manager, no change (except no error message about that).
3) Since I changed nvidia-304-updates to nvidia-313-updates, computer was turned off properly, but only for the first time. 310-updates - same problem.
4) Clean install of 13.04 on another partition, no nvidia driver. Tried to suspend(sleep), it worked, but after wake up the screen was only blank and I had to do hard reset again.
5) Now I am on my old partition and I have no sound. It seems there is something wrong not in nvidia, but in kernel and it is somehow related to drivers (nvidia, modem, sound, hdd ...?). And it is not fully repeatable, maybe some race condition? Is / unmounted really after all unneeded applications and drivers are stopped?

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to sysvinit in Ubuntu.
https://bugs.launchpad.net/bugs/1170911

Title:
  "mount: / is busy" error during shutdown (not network-manager)

Status in “sysvinit” package in Ubuntu:
  Confirmed

Bug description:
  When I halt Ubuntu ugly (but probably harmless) error messages about
  unmounting several filesystems (including the root) are displayed or
  the screen.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: mountall 2.48build1
  ProcVersionSignature: Ubuntu 3.8.0-19.29-generic 3.8.8
  Uname: Linux 3.8.0-19-generic i686
  ApportVersion: 2.9.2-0ubuntu8
  Architecture: i386
  Date: Sat Apr 20 11:08:07 2013
  InstallationDate: Installed on 2013-02-05 (73 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha i386 (20130205)
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: mountall
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/sysvinit/+bug/1170911/+subscriptions