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[sudodus <1552985@xxxxxxxxxxxxxxxxxx>]

Booted via grub-n-iso shutdown works for me, but not when the pendrive
was created by cloning the current Lubuntu Xenial i386 daily iso file,

xenial-desktop-i386.iso

Today I tested with USB-creator-gtk 0.3.2 and mkusb, but can get the
same result with other cloning tools, e.g. gnome-disks, dd.

In other words, my live drive is affected when booted from a cloned
system, but not from a grub-n-iso system made from the same iso file. I
suspect that this bug is the same or closely related to the bug that
also affects virtual machines,

https://bugs.launchpad.net/ubuntu/+source/casper/+bug/966480

It is described as a race condition by Chris Bainbridge:

https://bugs.launchpad.net/ubuntu/+source/casper/+bug/966480/comments/58

-o-

Details: I tested this in a laptop bought 2013 (that I am often using
for iso testing),

http://www.toshiba.se/laptops/satellite-pro/c850/satellite-pro-c850-19w/

and in a desktop computer with the following motherboard bought 2008,

http://www.asus.com/Motherboards/M2NVM_DVI/

A Sandisk Cruzer blade 4 GB USB drive cloned to a 'live-only' system
with USB-creator-gtk 0.3.2 and mkusb is affected by this bug in both
those computers.

The same USB drive made into a grub-n-iso system with the same Lubuntu
daily iso file according to the link

http://ubuntuforums.org/showthread.php?t=2259682&p=13302278#post13302278

or made into a persistent live drive with mkusb according to this link

https://help.ubuntu.com/community/mkusb/persistent

can be shut down or rebooted properly (so these systems booted via grub
are not affected).

PS.

Until this bug  is squashed (and in other cases where a linux system is
unresponsive)I recommend

SysRq + r e i s u b

described in the following link

https://en.wikipedia.org/wiki/Magic_SysRq_key

DS.

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https://bugs.launchpad.net/bugs/1552985

Title:
  [Dell Inspiron 14 3000 Series] System hangs on poweroff

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Xubuntu 14.04.4 LTS
  Linux 3.13.0-79-generic #123-Ubuntu SMP Fri Feb 19 14:27:58 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

  When shutting down the system, it gets stuck on the Xubuntu splash
  screen. I have to press the power button for a while to have it shut
  down.

  This is a dual boot system: Windows 10 and Xubuntu 14.04. I updated BIOS version to A10 a couple of days ago. It hanged when trying to shut down from both Windows and Xubuntu.
  After installing the firmware update from http://www.dell.com/support/article/mx/es/mxbsdt1/SLN300281/EN, the computer shuts down correctly from Windows, but still gets stuck when trying to shut down from Xubuntu, no matter if using the "Shutdown" button or running "shutdown -h now" or "poweroff" from a terminal.

  I found a similar bug here:
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1341925?comments=all,
  but the solution mentioned there did not work for me, also, I don't
  have any problems when rebooting the computer, just when trying to
  shut down.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-79-generic 3.13.0-79.123
  ProcVersionSignature: Ubuntu 3.13.0-79.123-generic 3.13.11-ckt33
  Uname: Linux 3.13.0-79-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  jorge      2347 F.... pulseaudio
   /dev/snd/controlC1:  jorge      2347 F.... pulseaudio
  CurrentDesktop: XFCE
  Date: Thu Mar  3 18:43:20 2016
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-11-18 (471 days ago)
  InstallationMedia: Xubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140723)
  MachineType: Dell Inc. Inspiron 3442
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-79-generic.efi.signed root=UUID=bc5b1ae8-a10c-4705-afc7-3cf3c2538883 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-79-generic N/A
   linux-backports-modules-3.13.0-79-generic  N/A
   linux-firmware                             1.127.20
  SourcePackage: linux
  StagingDrivers: rts5139
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/03/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A10
  dmi.board.name: 0260GN
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A10
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: Not Specified
  dmi.modalias: dmi:bvnDellInc.:bvrA10:bd11/03/2015:svnDellInc.:pnInspiron3442:pvrNotSpecified:rvnDellInc.:rn0260GN:rvrA10:cvnDellInc.:ct8:cvrNotSpecified:
  dmi.product.name: Inspiron 3442
  dmi.product.version: Not Specified
  dmi.sys.vendor: Dell Inc.

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