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[Cormac <cormac.wilcox@xxxxxxxxx>]

Not an Ubuntu/Linux kernel issue.  It was an Nvidia driver issue.

** Changed in: linux (Ubuntu)
       Status: Incomplete => Invalid

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https://bugs.launchpad.net/bugs/1002824

Title:
  Ubuntu shutdown/restart failure

Status in “linux” package in Ubuntu:
  Invalid

Bug description:
  Bug reported as per instructions from Christopher M. Penalver
  (penalvch)

  Shutdown and Reboot failure on Dell XPS/nVidia 295.49/Ubuntu 12.04

  Sometimes "sudo reboot -h now" works, sometime not.

  Had the same problem on 11.10 so I didn't install nVidia driver on a
  clean 12.04 install but problem was still there. Installed the nVidia
  driver because it didn't make a difference.

  Tried stopping various unity processes using "system monitor" before a reboot (sudo reboot -h now) and this seems to work but it is terribly inefficient
  The unity processes stopped:
  unity-files-daemon
  unity-applications-daemon

  I then tried it using the ubuntu "shutdown" button after stopping the
  same processes and it also seems to have worked

  WORKAROUND: Reverted to non-mainline kernel "linux-headers-3.2.0-25
  -generic-pae" and removed all nvidia drivers. Operating on nouveau
  graphics drivers shutdown and Restart work perfectly.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-24-generic-pae 3.2.0-24.38
  ProcVersionSignature: Ubuntu 3.2.0-24.38-generic-pae 3.2.16
  Uname: Linux 3.2.0-24-generic-pae i686
  NonfreeKernelModules: nvidia
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu7
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  cormac     1724 F.... pulseaudio
   /dev/snd/controlC0:  cormac     1724 F.... pulseaudio
                        cormac     1765 F.... TeamViewer.exe
   /dev/snd/controlC1:  cormac     1724 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xfebfc000 irq 47'
     Mixer name	: 'SigmaTel STAC9228'
     Components	: 'HDA:83847616,1028022e,00100201'
     Controls      : 28
     Simple ctrls  : 19
  Card1.Amixer.info:
   Card hw:1 'Set'/'C-Media USB Headphone Set at usb-0000:00:1d.7-1.2, full speed'
     Mixer name	: 'USB Mixer'
     Components	: 'USB0d8c:000c'
     Controls      : 7
     Simple ctrls  : 3
  Card2.Amixer.info:
   Card hw:2 'U0x46d0x809'/'USB Device 0x46d:0x809 at usb-0000:00:1d.7-1.3.3, high speed'
     Mixer name	: 'USB Mixer'
     Components	: 'USB046d:0809'
     Controls      : 2
     Simple ctrls  : 1
  Card2.Amixer.values:
   Simple mixer control 'Mic',0
     Capabilities: cvolume cvolume-joined cswitch cswitch-joined penum
     Capture channels: Mono
     Limits: Capture 0 - 17
     Mono: Capture 10 [59%] [20.70dB] [on]
  Date: Tue May 22 12:45:57 2012
  HibernationDevice: RESUME=UUID=5e07cde7-2884-46fe-a4d3-362c6a19050e
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
  MachineType: Dell Inc. XPS M1530
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic-pae root=UUID=8ece3500-c862-476e-9e19-aa92885f05b6 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-24-generic-pae N/A
   linux-backports-modules-3.2.0-24-generic-pae  N/A
   linux-firmware                                1.79
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/14/2008
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A09
  dmi.board.name: 0XR509
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA09:bd07/14/2008:svnDellInc.:pnXPSM1530:pvr:rvnDellInc.:rn0XR509:rvr:cvnDellInc.:ct8:cvr:
  dmi.product.name: XPS M1530
  dmi.sys.vendor: Dell Inc.

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