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[Bug 1526661] Re: Ubuntu 15.10 hangs on shutdown


Did this issue start happening after an update/upgrade?  Was there a
prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.4 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:

Once testing of the upstream kernel is complete, please mark this bug as

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4-rc5-wily

** Changed in: linux (Ubuntu)
   Importance: Critical => High

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  Ubuntu 15.10 hangs on shutdown

Status in linux package in Ubuntu:

Bug description:
  Ubuntu 15.10 hangs on shutdown with both generic and lowlatency kernels.  In order to shutdown without forcing by pressing long on the laptop button, I need to restart, and then to shutdown, and then the shutdown takes more than a minute, which isn't the case with 14.04 which shutdowns in just few seconds. This happens with both fresh install and updated system.
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
   /dev/snd/controlC0:  m          1472 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 15.10
  HibernationDevice: RESUME=UUID=def28845-51c2-4e63-b7c4-b6170784fa4a
  InstallationDate: Installed on 2015-12-16 (0 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  MachineType: Acer Aspire E1-570
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-19-lowlatency root=UUID=2eb5def1-1551-4c4d-ae5d-1989c495b47a ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 4.2.0-19.23-lowlatency 4.2.6
   linux-restricted-modules-4.2.0-19-lowlatency N/A
   linux-backports-modules-4.2.0-19-lowlatency  N/A
   linux-firmware                               1.149.3
  Tags:  wily
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  Uname: Linux 4.2.0-19-lowlatency x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 10/08/2013
  dmi.bios.vendor: Insyde Corp.
  dmi.bios.version: V2.06
  dmi.board.asset.tag: Type2 - Board Asset Tag
  dmi.board.name: EA50_CX
  dmi.board.vendor: Acer
  dmi.board.version: V2.06
  dmi.chassis.asset.tag: Acer Asset Tag String
  dmi.chassis.type: 10
  dmi.chassis.vendor: Insyde Corp.
  dmi.chassis.version: V2.06
  dmi.modalias: dmi:bvnInsydeCorp.:bvrV2.06:bd10/08/2013:svnAcer:pnAspireE1-570:pvrV2.06:rvnAcer:rnEA50_CX:rvrV2.06:cvnInsydeCorp.:ct10:cvrV2.06:
  dmi.product.name: Aspire E1-570
  dmi.product.version: V2.06
  dmi.sys.vendor: Acer

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