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[Chris Clarke <chris@xxxxxxxxxxxxxxxxxx>]

Using the below mainline kernel

Linux pc-cclar-02 3.19.8-031908ckt7-generic #201509251130 SMP Fri Sep 25
15:32:30 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

The issue does not occur


** Tags added: kernel-fixed-upstream

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https://bugs.launchpad.net/bugs/1501736

Title:
  Kernel lock up on reboot/shutdown since upgrade

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  When trying to shut down or reboot the system, the system freezes and
  is not responsive.  A kernel error is shown on the screen (I will
  attach after posting this)  This is with the radeon module.

  When reverting back to 3.19.0-28 this works as expected.

  I'm using XUbuntu 15.04 - fully updated.

  This is my first bug report, so please be gentle.  I'll endeavor to
  attach and do whatever is needed to provide the right information but
  I'm currently a little lost in this whole process.

  Chris.
  --- 
  ApportVersion: 2.17.2-0ubuntu1.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  cclarke    1469 F.... pulseaudio
   /dev/snd/controlC1:  cclarke    1469 F.... pulseaudio
  CurrentDesktop: XFCE
  DistroRelease: Ubuntu 15.04
  HibernationDevice: RESUME=UUID=b3f4c068-1eb6-4038-9604-82237679d7a2
  InstallationDate: Installed on 2015-09-18 (13 days ago)
  InstallationMedia: Xubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422.1)
  MachineType: Dell Inc. Inspiron 7548
  Package: linux (not installed)
  ProcFB:
   0 inteldrmfb
   1 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-30-generic.efi.signed root=/dev/mapper/xubuntu--vg-root ro quiet
  ProcVersionSignature: Ubuntu 3.19.0-30.33-generic 3.19.8-ckt6
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-30-generic N/A
   linux-backports-modules-3.19.0-30-generic  N/A
   linux-firmware                             1.143.3
  Tags:  vivid
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  Uname: Linux 3.19.0-30-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 07/13/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A04
  dmi.board.name: 0AM6R0
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: Not Specified
  dmi.modalias: dmi:bvnDellInc.:bvrA04:bd07/13/2015:svnDellInc.:pnInspiron7548:pvrA04:rvnDellInc.:rn0AM6R0:rvrA00:cvnDellInc.:ct8:cvrNotSpecified:
  dmi.product.name: Inspiron 7548
  dmi.product.version: A04
  dmi.sys.vendor: Dell Inc.

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