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[James Hunt <1244312@xxxxxxxxxxxxxxxxxx>]

@Rebecca: yes, but the man page is referring to bugs in the reboot
command. That commands calls the reboot system call and that is where
the problem lies (in the kernel).

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https://bugs.launchpad.net/bugs/1244312

Title:
  [regression 13.10] Can't reboot (but can shut down)

Status in “linux” package in Ubuntu:
  Confirmed
Status in “upstart” package in Ubuntu:
  New

Bug description:
  Since upgrading to 13.10, attempting to restart (with either "shutdown
  -r now" or the system menu item) hangs with a "reboot: restarting
  system" message instead of actually rebooting, but shutting down still
  turns the system off.

  WORKAROUND: adding reboot=p to the kernel command line
  (https://wiki.ubuntu.com/Kernel/KernelBootParameters) avoids this bug.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: upstart 1.10-0ubuntu7
  ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
  Uname: Linux 3.11.0-12-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.12.5-0ubuntu2
  Architecture: amd64
  Date: Thu Oct 24 17:25:08 2013
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2012-01-25 (637 days ago)
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  MarkForUpload: True
  ProcKernelCmdline: BOOT_IMAGE=/boot/vmlinuz-3.11.0-12-generic root=UUID=b491a34a-6045-4ad4-a2b8-b9ca018c5d41 ro quiet splash
  SourcePackage: upstart
  UpgradeStatus: Upgraded to saucy on 2013-10-21 (2 days ago)
  UpstartBugCategory: System
  UpstartRunningSessionVersion: init (upstart 1.10)
  UpstartRunningSystemVersion: init (upstart 1.10)
  modified.conffile..etc.at.deny: [inaccessible: [Errno 13] Permission denied: '/etc/at.deny']
  modified.conffile..etc.init.d.networking: [modified]
  mtime.conffile..etc.init.d.networking: 2013-08-26T23:19:11
  --- 
  ApportVersion: 2.12.5-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  palmer     2534 F.... pulseaudio
   /dev/snd/controlC0:  palmer     2534 F.... pulseaudio
   /dev/snd/pcmC0D0p:   palmer     2534 F...m pulseaudio
  DistroRelease: Ubuntu 13.10
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2012-01-25 (638 days ago)
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  MachineType: Dell Inc. Latitude E6520
  MarkForUpload: True
  NonfreeKernelModules: nvidia
  Package: linux (not installed)
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-12-generic root=UUID=b491a34a-6045-4ad4-a2b8-b9ca018c5d41 ro quiet splash
  ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-12-generic N/A
   linux-backports-modules-3.11.0-12-generic  N/A
   linux-firmware                             1.116
  Tags:  saucy
  Uname: Linux 3.11.0-12-generic x86_64
  UpgradeStatus: Upgraded to saucy on 2013-10-21 (3 days ago)
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
  dmi.bios.date: 10/18/2011
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A08
  dmi.board.name: 0J4TFW
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A01
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA08:bd10/18/2011:svnDellInc.:pnLatitudeE6520:pvr01:rvnDellInc.:rn0J4TFW:rvrA01:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E6520
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.
  --- 
  ApportVersion: 2.12.5-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  palmer     2534 F.... pulseaudio
   /dev/snd/controlC0:  palmer     2534 F.... pulseaudio
  DistroRelease: Ubuntu 13.10
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2012-01-25 (638 days ago)
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  MachineType: Dell Inc. Latitude E6520
  MarkForUpload: True
  NonfreeKernelModules: nvidia
  Package: linux (not installed)
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-12-generic root=UUID=b491a34a-6045-4ad4-a2b8-b9ca018c5d41 ro quiet splash
  ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-12-generic N/A
   linux-backports-modules-3.11.0-12-generic  N/A
   linux-firmware                             1.116
  Tags:  saucy
  Uname: Linux 3.11.0-12-generic x86_64
  UpgradeStatus: Upgraded to saucy on 2013-10-21 (3 days ago)
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
  dmi.bios.date: 10/18/2011
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A08
  dmi.board.name: 0J4TFW
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A01
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA08:bd10/18/2011:svnDellInc.:pnLatitudeE6520:pvr01:rvnDellInc.:rn0J4TFW:rvrA01:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E6520
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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