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

[Roger Kauffman]

I am running 13.04 64 bit and using the GeForce GT430/PCle/SSe2 Nvidia
driver.  I am also experiencing the Hang on shutdown with messages
relating to "busy" mount.

I have also installed the Linux 3.9.0-030900rc8-generic (x86_64) kernel
which does not solve the hanging problem.

My install started out as an upgrade and finished up as a clean install
after several problems.

The following is a snapshot of my system:

-Computer-
Processor		: 4x Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz
Memory		: 3980MB (1038MB used)
Operating System		: Ubuntu 13.04
User Name		: roger (Roger Kauffman)
Date/Time		: Mon 01 Jul 2013 16:31:03 EST
-Display-
Resolution		: 1920x1080 pixels
OpenGL Renderer		: Unknown
X11 Vendor		: The X.Org Foundation
-Multimedia-
Audio Adapter		: HDA-Intel - HDA Intel
Audio Adapter		: HDA-Intel - HDA NVidia
Audio Adapter		: USB-Audio - USB Device 0x46d
-Input Devices-
 Sleep Button
 Power Button
 HID Keyboard Device
 HID Keyboard Device
 PIXART USB OPTICAL MOUSE
 HDA Intel Line
 HDA Intel Rear Mic
 HDA Intel Front Mic
 HDA Intel Front Headphone
 HDA Intel Speaker CLFE
 HDA Intel Speaker Surround
 HDA Intel Speaker Front
 HDA NVidia HDMI/DP,pcm		: 9=
 HDA NVidia HDMI/DP,pcm		: 8=
 HDA NVidia HDMI/DP,pcm		: 7=
 HDA NVidia HDMI/DP,pcm		: 3=
 gspca_zc3xx
-Printers (CUPS)-
Brother-HL-3070CW-series		: <i>Default</i>
-SCSI Disks-
ATAPI iHAS324   B
PIONEER DVD-RW  DVR-215
ATA ST31000524AS
ATA ST3320620AS
Generic- Compact Flash
Generic- SM/xD-Picture
Generic- SD/MMC
Generic- MS/MS-Pro

Obviously i would appreciate any help you may be able to give.

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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)

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