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Message #134410
[Bug 1404302] Re: liblttng-ust0 Error opening shm /lttng-ust-wait-5
===========test2.qml================
import QtQuick 2.3
import Ubuntu.Content 0.1
Rectangle { color: "pink" }
===========test.qml==============
import QtQuick 2.0
Rectangle {
color: "red"
Loader { id: loader; anchors.fill: parent; }
MouseArea {
anchors.fill: parent
onClicked: loader.source = "test2.qml"
}
}
Run:
LTTNG_UST_DEBUG=1 aa-exec-click -p com.ubuntu.camera_camera_3.0.0.611 --
qmlscene test.qml --desktop_file_hint=dialer-app
which enables extra LTTng output. I get some from Mir at startup - still
no LTTng warning messages printing. But then I hit the screen, to load
Ubuntu.Content plugin. I then get messages that ubuntu-app-launch
registers tracepoints, and the warning messages start repeating.
My log here: http://pastebin.ubuntu.com/14883688/
Maybe UAL imported as library is doing it? I don't know yet
--
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Touch seeded packages, which is subscribed to content-hub in Ubuntu.
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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https://bugs.launchpad.net/canonical-developer-experience/+bug/1404302/+subscriptions
References