** Description changed:

  I've got msi gp62m 7rex leopard pro laptop. Previously i was running
  ubuntu 16.04 on it, then i decided to upgrade to 18.04. I installed
  ubuntu 18.04 on ssd+hdd (/ on ssd, /home on hdd, ssd luks+lvm, hdd
  luks). Then i installed nvidia-384 drivers and cinnamon. Everything
  worked fine, but one day it just stopped powering off when shutting
- down, rebooting  bug or suspending. I fully reinstalled ubuntu (note:
- image was downloaded after the bug started to occur), but the bug still
+ down, rebooting or suspending. I fully reinstalled ubuntu (note: image
+ was downloaded after the bug started to occur), but the bug still
  persists - not powering off. I tried another kernel - 4.13, i tried
  running ubuntu in software rendering mode, using integrated graphics
  instead of nvidia, stopping display manager before shutting down,
  updating and resetting everything, including bios, but no luck. I tried
  adding acpi=force in /etc/default/grub, removing 'quiet splash' -
  nothing changed.
  
  When shutting down or rebooting it stops at:
  
  All filesystems unmounted
  Deactivating swaps
  All swaps deactivated
  Detaching loop devices
  All loop devices detached
  Detaching DM devices
- kvm: exiting hardware virtualization 
+ kvm: exiting hardware virtualization
  
  When suspending:
  
  Suspending console(s) (use no_console_suspend to debug)
  
  This also occurs on the live image.
  
  On boot it shows this messages related to acpi:
  
  [    0.050394] ACPI Error: [^^^PEG0.PEGP.EASP] Namespace lookup failure, 
AE_NOT_FOUND (20170831/psargs-364)
  [    0.050411] ACPI Error: Method parse/execution failed 
\_SB.PCI0.LPCB.EC._REG, AE_NOT_FOUND (20170831/psparse-550)
  [    0.050431] ACPI: \: Used as first EC
  [    0.050432] ACPI: \: GPE=0x13, EC_CMD/EC_SC=0x66, EC_DATA=0x62
  [    0.050433] ACPI: \: Used as boot ECDT EC to handle transactions
  [    0.054052] ACPI Exception: Could not find/resolve named package element: 
V0PR (20170831/dspkginit-381)
  [    0.054080] ACPI Exception: Could not find/resolve named package element: 
V0PR (20170831/dspkginit-381)
  [    0.054119] ACPI Exception: Could not find/resolve named package element: 
V1PR (20170831/dspkginit-381)
  [    0.054144] ACPI Exception: Could not find/resolve named package element: 
V1PR (20170831/dspkginit-381)
  [    0.054182] ACPI Exception: Could not find/resolve named package element: 
V2PR (20170831/dspkginit-381)
  [    0.054207] ACPI Exception
  
  Tho is resets if i hit <alt> <sysrq> <b>, doesn't power off if a hit <o>
  instead of <b>, but powers off if i do it on the encryption passphrase
  prompt.

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https://bugs.launchpad.net/bugs/1782408

Title:
  not powering off at shutdown, reboot or suspend

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