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[Bug 1404302] Re: liblttng-ust0 Error opening shm /lttng-ust-wait-5

 

Yep, as test, inside
/usr/share/click/preinstalled/com.ubuntu.camera/current create this
simple QML file: test.qml:

import QtQuick 2.0
import Ubuntu.Content 0.1

Rectangle {
    color: "red"
}

and execute with:

aa-exec-click -p com.ubuntu.camera_camera_3.0.0.611 -- qmlscene test.qml
--desktop_file_hint=dialer-app

You'll get the LTTng messages printed

** Also affects: content-hub (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: content-hub (Ubuntu)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1404302

Title:
  liblttng-ust0 Error opening shm /lttng-ust-wait-5

Status in Client Developer Experience:
  Confirmed
Status in platform-api:
  New
Status in content-hub package in Ubuntu:
  New
Status in qtmir package in Ubuntu:
  Invalid
Status in webbrowser-app package in Ubuntu:
  Confirmed

Bug description:
  Confined apps don't have access to this and continuously produce this
  error message in stderr:

  libust[31283/31285]: Error: Error opening shm /lttng-ust-wait-5 (in
  get_wait_shm() at lttng-ust-comm.c:958)

  
  This is printed to the application's log about once every other second and makes it hard to read the application's own debug output. For a better app developer experience this message should be silenced.

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References