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[Andy Whitcroft <apw@xxxxxxxxxxxxx>]

This bug was nominated against a series that is no longer supported, ie
artful.  The bug task representing the artful nomination is being closed
as Won't Fix.

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

** Changed in: linux (Ubuntu Artful)
       Status: Incomplete => Won't Fix

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https://bugs.launchpad.net/bugs/1701222

Title:
  [Hyper-V] LIS daemons fail to start after disable/re-enable VM
  integration services

Status in linux package in Ubuntu:
  Incomplete
Status in systemd package in Ubuntu:
  New
Status in linux source package in Xenial:
  Incomplete
Status in linux source package in Zesty:
  Incomplete
Status in linux source package in Artful:
  Won't Fix

Bug description:
  Issue description: Hyper-V daemons fail to start after disable/re-
  enable VM integration services.

  Platform: host independent
  Affected daemons - KVP, FCOPY and VSS.

  Distribution name and release: Ubuntu 16.04, Ubuntu 17.04
  Kernel version: 4.11.0-rc7-next-20170421 (for Ubuntu 16.04), 4.10.0-19-generic (for Ubuntu 17.04)

  Repro rate: 100%

  Steps to reproduce:
  1.	Start VM with Guest Services enabled (FCopy daemon starts automatically)
  2.	Go to File > Settings > Integration Services, uncheck Guest Services and apply (FCopy daemon will stop at this point)
  3.	Re-enable Guest Services from VM Settings (Fcopy daemon is not running).
  This is the issue. systemd monitors for the service and if we have the hook for the Guest Service, it tries to start the daemon again.
  systemd attempt to start any of the LIS daemons will fail, but manually executing the daemon binary, it will start the daemon.

  Additional Info:
  - the steps above can be repro'd with KVP / Data Exchange integration service as well.
  - Manually starting hv_fcopy_daemon works fine.
  - other distros (RHEL) does not have this behavior, the LIS daemons are started automatically by systemd once we re-enable the integration service.

  On the upstream kernel and the upstream hv daemons, these messages are recorded in syslog, once we re-enable the Guest service:
  HV_FCOPY: pread failed: Bad file descriptor
  systemd[1]: hv-fcopy-daemon.service: Main process exited, code=exited, status=1/FAILURE
  systemd[1]: hv-fcopy-daemon.service: Unit entered failed state.
  systemd[1]: hv-fcopy-daemon.service: Failed with result 'exit-code'.

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