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While running an Ubuntu kernel (not a mainline or third-party kernel)
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apport-collect 1913853

and then change the status of the bug to 'Confirmed'.

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This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

** Tags added: xenial

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https://bugs.launchpad.net/bugs/1913853

Title:
  Ubuntu 16.04 kernel 4.4.0-202 basic commands hanging

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Hi there,
  I've updated kernel on my Ubuntu 16.04 from 4.4.0-201-generic to 
4.4.0.202-generic today and it broke my system.
  Basic commands, such as pidof, lsof, ps fax (ps -a works) hang indefinitely 
and not even root issued kill -KILL will terminate them. Only thing that helps 
is to kill the shell that started such commands.

  I had to reboot back to 4.4.0-201, however during shutdown various
  stop jobs hanged as well and after more than 25 minutes I had to go
  for hard reboot.

  My current—NOT BROKEN—kernel has signature (cat /proc/version_signature):
  Ubuntu 4.4.0-201.233-generic 4.4.247

  I am attaching the lspci-vnvn.log, also created with the non-broken
  kernel.

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