It seems webbrowser-app is affected by this issue again (see bug
#1606946).
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https://bugs.launchpad.net/bugs/1404302
Title:
liblttng-ust0 Error opening
Newer version of LTTng landed
** Changed in: telegram-app
Status: New => Invalid
** Changed in: webbrowser-app (Ubuntu)
Status: Confirmed => Invalid
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** Also affects: telegram-app
Importance: Undecided
Status: New
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Title:
liblttng-ust0 Error opening
** Changed in: ubuntu-app-launch (Ubuntu)
Status: Confirmed => Invalid
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Title:
liblttng-ust0 Error
So did some investigation into this and why the error message is
printing. It seems like it shouldn't be. Then I realized I was looking
at the version of libttng-ust in Xenial and not the one in Vivid. This
is fixed in Xenial with ust 2.7 in that it'll only print the errors if
UST debugging is
** Changed in: ubuntu-app-launch (Ubuntu)
Status: Invalid => New
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Title:
liblttng-ust0 Error opening shm
** Changed in: ubuntu-app-launch (Ubuntu)
Status: New => Fix Committed
** Changed in: ubuntu-app-launch (Ubuntu)
Status: Fix Committed => In Progress
** Changed in: canonical-developer-experience
Status: Confirmed => Fix Released
** Changed in: ubuntu-app-launch (Ubuntu)
Ok, I have an idea. content-hub links to libubuntu-app-launch.so, which
links to liblttng-ust.so. On load of liblttng-ust.so, it registers 2
tracepoint providers by default: ust_baddr_statedump and
lttng_ust_tracef. These are causing our repeating error messages.
Instead, I think we need to
I don't know if it's normal to have more than 70 files named:
untrusted-helper-push-helper:xxx:com.ubuntu.telegram_push_2.0.4.0 in
upstart folder which have four lines of these error inside :/
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Experience a similar error when testing my app recorder.
I am trying to add a "share" ability via the content-hub. I get to the
point when the peer picker window is displayed after which there is a
failed event.
On checking my app logs I find:
libust[24601/24606]: Error: Error opening shm
Trying to debug some telegram issues, here's what a log to work with
looks like.
Bump! :)
** Attachment added:
"application-click-com.ubuntu.telegram_telegram_2.0.4.1.log"
===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
Playing around with the camera app, I found that if I removed the
"Ubuntu.Content" plugin, the LTTng message stopped. So suspect something
content hub is linking with
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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
/me has to retract comment #13, it is indeed the app printing the
message. Camera app has 2 threads printing it
sudo strace -f -e write -p `pidof camera-app` 2>&1 | grep ust
[pid 14107] write(2, "libust[14085/14107]: Error: Erro"..., 114
[pid 14106] write(2, "libust[14085/14106]: Error:
@pat we need more of Ted's input then, as I don't follow what he's
suggesting as a fix.
My understanding is that lttng reporting is only enabled with a
particular env var. So it should always be off by default. But these
errors printing in logs would suggest otherwise.
** Changed in: qtmir
@gerry aiui we need to just do what ted said he did for ual in comment
#2
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Title:
liblttng-ust0 Error opening
@gerry for ual thats the case but not for the other packages that are
causing these to be logged. The same fix in ual needs to be applied to
use an env var and macro in qtmir and maybe elsewhere,
look at ual-tracepoints.h in ubuntu-app-launch
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I don't think it is the application printing this message. Attaching to
it with strace, it's not printing out when these lines appear in the
log. Upstart is reading these lines from *somewhere*, and writing them
to the log fine. But no idea from where yet
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: qtmir (Ubuntu)
Status: New => Confirmed
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Pat, it should be a simple fix to disable the log line, but no one is
currently assigned (I removed Ricardo from the assignment just now).
** Changed in: platform-api
Assignee: Ricardo Mendoza (ricmm) => (unassigned)
** Changed in: qtubuntu
Assignee: Ricardo Mendoza (ricmm) =>
** Changed in: qtubuntu
Importance: Undecided => High
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Title:
liblttng-ust0 Error opening shm /lttng-ust-wait-5
Making it difficult to debug qtubuntu-media with music-app. Would like
to see this fixed very soon.
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Title:
** Also affects: qtmir (Ubuntu)
Importance: Undecided
Status: New
** Changed in: qtmir (Ubuntu)
Assignee: (unassigned) => Gerry Boland (gerboland)
** No longer affects: qtubuntu
** No longer affects: ust (Ubuntu)
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** Project changed: canonical-devices-system-image => canonical-
developer-experience
** Changed in: canonical-developer-experience
Milestone: ww46-2015 => None
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These message are also all through the log for the camera app.
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Title:
liblttng-ust0 Error opening shm /lttng-ust-wait-5
** Changed in: canonical-devices-system-image
Status: New => Confirmed
** Changed in: canonical-devices-system-image
Importance: Undecided => Low
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Raising importance to high, it has a severe impact on the developer
experience by making logs very difficult to read.
** Changed in: canonical-devices-system-image
Importance: Low => High
** Changed in: canonical-devices-system-image
Assignee: (unassigned) => Pat McGowan (pat-mcgowan)
Adding webapp-container, which is impacted. We can implement Ted's
suggestion of turning on tracepoints on demand on our side.
** Also affects: webbrowser-app (Ubuntu)
Importance: Undecided
Status: New
** Changed in: webbrowser-app (Ubuntu)
Status: New => Confirmed
** Changed
** Also affects: canonical-devices-system-image
Importance: Undecided
Status: New
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Title:
liblttng-ust0 Error
i'm getting this when trying to load an image with sdl2_image o_O
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Title:
liblttng-ust0 Error opening shm
SDL_Init()
shm_open() failed: Permission denied
Initialized, drawing...
libust[13945/13949]: Error: Error opening shm /lttng-ust-wait-5-32011 (in
get_wait_shm() at lttng-ust-comm.c:958)
libust[13945/13949]: Error: Error opening shm /lttng-ust-wait-5-32011 (in
get_wait_shm() at
This also happen with libvirtd apparmor profile in enforce mode: virtual
machines (ie sub profiles with libvirt-someUUID) will constantly
complain they are denied read access to /dev/shm/lttng-ust-wait-5
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I am getting this error when trying to play a video. Is this likely to
be fixed soon?
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Title:
liblttng-ust0 Error
What I did for UAL is turn them on with an environment variable. That
way we can still test the production images but we don't have to get
errors with confined apps.
** Changed in: platform-api
Assignee: Ted Gould (ted) = Ricardo Mendoza (ricmm)
** Changed in: qtubuntu
Assignee: Ted
** Changed in: ust (Ubuntu)
Status: New = Confirmed
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Title:
liblttng-ust0 Error opening shm /lttng-ust-wait-5
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