Ubuntu
unity8 package

With Mir enabled - Applications randomly failed to start

Bug #1234538 reported by Jean-Baptiste Lallement on 2013-10-03

This bug affects 1 person

	Status	Importance	Assigned to	Milestone
Mir	Invalid	High	Unassigned
unity-mir	Fix Released	High	Gerry Boland	unity-mir phone-v1-freeze
unity8 (Ubuntu)	Fix Released	High	Unassigned

Bug Description

On a MIR enabled phone

TEST CASE:
1. Reveal the launcher and start the application on the top of the list
2. Reveal the launcher again and start the next application on the list
3. Repeat step 2 for all the applications of the list

ACTUAL RESULT
Some applications will never start. They will stay blank, and thumbnail on 'Recent apps' will remain transparent.

Content of /home/phablet attached.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: unity8 7.81.3+13.10.20130927.3-0ubuntu1
Uname: Linux 3.4.0-3-mako armv7l
ApportVersion: 2.12.5-0ubuntu1
Architecture: armhf
Date: Thu Oct 3 06:54:02 2013
InstallationDate: Installed on 2013-10-03 (0 days ago)
InstallationMedia: Ubuntu Saucy Salamander (development branch) - armhf (20131003)
MarkForUpload: True
ProcEnviron:
TERM=linux
PATH=(custom, no user)
SourcePackage: unity8
UpgradeStatus: No upgrade log present (probably fresh install)

See original description

Tags:

Revision history for this message

Jean-Baptiste Lallement (jibel) wrote on 2013-10-03:

_home_phablet_cache.tgz Edit (399.0 KiB, application/x-tar)
Dependencies.txt Edit (10.1 KiB, text/plain; charset="utf-8")

Changed in unity8 (Ubuntu):
importance:	Undecided → High

Revision history for this message

Daniel van Vugt (vanvugt) wrote on 2013-10-03:

Mir's not an acronym... I think... ?

summary:

- With MIR enabled - Applications randomly failed to start
+ With Mir enabled - Applications randomly failed to start

kevin gunn (kgunn72) on 2013-10-03

Changed in unity-mir:
importance:	Undecided → High
Changed in mir:
importance:	Undecided → High
Changed in unity-mir:
assignee:	nobody → Gerry Boland (gerboland)
milestone:	none → phone-v1-freeze
Changed in mir:
milestone:	none → phone-v1-freeze

Revision history for this message

Gerry Boland (gerboland) wrote on 2013-10-04:

I suspect some non-click apps are using launch scripts to execute their binary. Unity-Mir will reject these apps unless the script passes the --desktop_file_hint=/path/to/desktop/file.desktop switch. I see several REJECTED apps in the unity8.log.

Culprit I know about is "notes-app" but there must be others. Must list all the apps and have them fixed

Gerry Boland (gerboland) on 2013-10-04

Changed in unity-mir:
status:	New → Confirmed
Changed in mir:
status:	New → Invalid

Revision history for this message

Jean-Baptiste Lallement (jibel) wrote on 2013-10-04:

Gerry, it is something different, in this defect, when you start several apps in a row some will start and some will not (exhibiting the same behaviour than notes) But it is not always the same applications.

Jean-Baptiste Lallement (jibel) on 2013-10-07

Changed in unity8 (Ubuntu):
status:	New → Confirmed

Revision history for this message

Michał Sawicz (saviq) wrote on 2013-10-08:

I just launched all my apps from the launcher in order and all of them worked :/

Jean, do you have some more concrete steps to repro? Or maybe it's just been fixed in the trunk versions of unity-mir I have...

Jean, can you try and reproduce after an image with new unity-mir is built?

Changed in unity-mir:
status:	Confirmed → Incomplete
Changed in unity8 (Ubuntu):
status:	Confirmed → Incomplete

Revision history for this message

Gerry Boland (gerboland) wrote on 2013-10-14:

I've tested with today's image (96) and can't make this happen. Tried fast launching, slow launching. Any clues would be helpful

Revision history for this message

Jean-Baptiste Lallement (jibel) wrote on 2013-10-14:

MOV_0052.mp4 Edit (76.1 MiB, video/mp4)

Here is a video to illustrate the case.
Note that after opening all the apps, when I click on gallery, dialer opens first, then gallery. Then when I tap on browser, there is a black screen and nothing happens anymore.

Revision history for this message

Jean-Baptiste Lallement (jibel) wrote on 2013-10-14:

s/black/blank/

Changed in unity-mir:
status:	Incomplete → Confirmed
Changed in unity8 (Ubuntu):
status:	Incomplete → Confirmed
description:	updated

Revision history for this message

Daniel van Vugt (vanvugt) wrote on 2013-10-17:

It would appear some apps are crashing or freezing. Can you please get a crash report, and/or stack traces of the frozen apps?

Changed in mir:
status:	Invalid → Incomplete

Daniel van Vugt (vanvugt) on 2013-10-17

Changed in mir:
milestone:	phone-v1-freeze → 0.0.17

Revision history for this message

Jean-Baptiste Lallement (jibel) wrote on 2013-10-17:

#10

gallery.strace Edit (2.0 KiB, text/plain)

strace of gallery-app when this defect is reproduced and gallery app is in a frozen state.
It is stuck in a 5 seconds loop on epoll_wait(21, {}, 16, 5000) = 0

Descriptor 21 corresponds to an anon_inode:[eventpoll]

Revision history for this message

Jean-Baptiste Lallement (jibel) wrote on 2013-10-17:

#11

Stacktrace Edit (5.4 KiB, text/plain)

Here is a stacktrace generated by killing gallery-app with SIGABRT

Revision history for this message

Jean-Baptiste Lallement (jibel) wrote on 2013-10-17:

#12

ThreadStacktrace Edit (47.3 KiB, text/plain)

and the thread stack trace.

Changed in mir:
status:	Incomplete → Confirmed

Revision history for this message

Jean-Baptiste Lallement (jibel) wrote on 2013-10-17:

#13

When this bug occurs, the apps launched before the app that freeze generates the crash in bug 1240835.

For example, I start all the apps on the launcher, then switch to camera-app, it is focused and running after a short moment, then switch to gallery-app, which fails to start (blank screen), a camera-app crash is generated in /var/crash.

Revision history for this message

Daniel van Vugt (vanvugt) wrote on 2013-10-22:

#14

Incomplete still. The ThreadStacktrace shows a bunch of normal idle threads. Nothing obvious is out of place.

Changed in mir:
status:	Confirmed → Incomplete
milestone:	0.1.0 → none

Dave Morley (davmor2) on 2013-12-04

tags:

added: gg

Revision history for this message

Nicholas Skaggs (nskaggs) wrote on 2013-12-06:

#15

This bug or one with similar results appears to be the primary reason for several app failures on the dashboard -- applications just don't seem to launch, thus causing the tests to fail. This is affecting all of the core apps. Here's an example with a trace:

http://ci.ubuntu.com/smokeng/trusty/touch/mako/40:20131130:20131129/5200/ubuntu-clock-app-autopilot/542024/

Any chance we can get this closed?

Revision history for this message

Gerry Boland (gerboland) wrote on 2013-12-06:

#16

It possible this bug may be related to:
https://bugs.launchpad.net/unity-mir/+bug/1243665
whose fix should land soon.

Revision history for this message

Timo Jyrinki (timo-jyrinki) wrote on 2013-12-11:

#17

The fixes for bug #1243665 have landed now.

Revision history for this message

kevin gunn (kgunn72) wrote on 2014-02-20:

#18

this is well established to be fixed.

Changed in unity-mir:
status:	Confirmed → Fix Released
Changed in mir:
status:	Incomplete → Fix Released
Changed in unity8 (Ubuntu):
status:	Confirmed → Fix Released

Revision history for this message

Daniel van Vugt (vanvugt) wrote on 2014-02-21:

#19

It seems no Mir fix was necessary.

Changed in mir:
status:	Fix Released → Invalid

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Duplicates of this bug

Bug #1240844

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Ubuntuunity8 package

With Mir enabled - Applications randomly failed to start

Bug Description

Duplicates of this bug

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unity8 package