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[Daniel van Vugt <daniel.van.vugt@xxxxxxxxxxxxx>]

** Also affects: mir (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1499042

Title:
  [android] std::exception::what: Failed to monitor fd: Operation not
  permitted when unplugging external display in a nested configuration

Status in Mir:
  Fix Committed
Status in mir package in Ubuntu:
  New

Bug description:
  Using the following nested configuration:

  sudo mir_demo_server --arw-file --display-config=sidebyside --input-
  report log --legacy-input-report log --scene-report log --debug
  --window-manager system-compositor --hwc-report log

   mir_demo_server --host-socket /tmp/mir_socket -f /tmp/nested_mir
  --display-config sidebyside --input-report log --legacy-input-report
  log --scene-report log --debug

  mir_demo_client_fingerpaint -m /tmp/nested_mir

  The nested server occasionally crashes. Excerpt of the last lines in
  the log:

  Input channel destroyed: name='Mir Fingerpaint', fd=34
  [1443033760.712569] scene: surface_removed(0xb2601908 ["Mir Fingerpaint"]) - INFO surface count=2
  Input channel destroyed: name='decoration', fd=38
  [1443033760.712935] scene: surface_removed(0xb2602eb8 ["decoration"]) - INFO surface count=2
  [1443033760.713057] scene: surface_deleted(0xb2601908 ["Mir Fingerpaint"]) - INFO surface count=1

  [1443033760.721541] scene: surface_deleted(0xb2602eb8 ["decoration"])
  - INFO surface count=0

  ERROR: /build/mir-GYyRoo/mir-0.15.1+15.04.20150903/src/common/dispatch/multiplexing_dispatchable.cpp(263): Throw in function void mir::dispatch::MultiplexingDispatchable::add_watch(const std::shared_ptr<mir::dispatch::Dispatchable>&, mir::dispatch::DispatchReentrancy)
  Dynamic exception type: N5boost16exception_detail10clone_implINS0_19error_info_injectorISt12system_errorEEEE
  std::exception::what: Failed to monitor fd: Operation not permitted

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