Icons in launcher sometimes refuse to launch application

[SB]

After OTA-9 on BQ Aquaris E4.5 I am sometimes experiencing strange behavior of icons on the launcher, sometimes they refuse to launch the application and nothing helps except reboot, launching the application from the Apps scope works however, removing the icon from the launcher, launching from scope and then pinning the icon to the launcher does nothing, when you tap the newly added icon application does not launch, only reboot helps.

This happened with File Manager, Browser and Gallery, generally after they froze/crashed. Other applications launch normally. I checked /var/crash after Gallery froze today (then I closed it and tried to relaunch it with the icon in the launcher), but nothing inside from today, last log there is from 31.1 it seems.

http://paste.ubuntu.com/14865896/

http://paste.ubuntu.com/14865887/

Unity logs.

Any other logs I can check? Upload older crash files?

[SB (emehntehtt)]

I have just discovered that Gallery now launches from the launcher, like it recovered somehow after some time.

[Michael Zanetti (mzanetti)]

I've seen this too since OTA-9.

[Michael Zanetti (mzanetti)]

Just happened again. Managed to catch a log:

When I press the address-book-app in the launcher, I get this output from unity8.log but the app does *NOT* launch:

qtmir.applications: ApplicationManager::startApplication - this= qtmir::ApplicationManager(0xf66570, name = "qtmir::ApplicationManager") appId address-book-app
ApplicationManager::startApplication - application appId= "address-book-app" is queued to start

This indicates that the call ends up in QtMir properly and it seems to get lost in there.

reassigning the issue to QtMir

[Michael Zanetti (mzanetti)]

For the record, here's the full unity8.log when this issue happens.

http://paste.ubuntu.com/14867269/

[Nick Dedekind (nick-dedekind)]

I can reproduce this now:

1) open dialer-app from dash (wait for full load).
2) switch back to dash and wait a few seconds
3) simulate app failure using ssh "kill -9 `pidof dialer-app`".
4) open switcher and swipe app placeholder away.

You should now be in the state where you cannot re-load the app.

[Launchpad Janitor (janitor)]

This bug was fixed in the package qtmir - 0.4.7+16.04.20160208-0ubuntu1

---------------
qtmir (0.4.7+16.04.20160208-0ubuntu1) xenial; urgency=medium

  [ Nick Dedekind ]
  * Added fix and test for closing app during the StoppedResumable
    state. (LP: #1541388)

 -- Michał Sawicz <email address hidden> Mon, 08 Feb 2016 09:36:17 +0000

[Michael S. (i-mich9el-s)]

This issue is NOT fixed. It still occurs with OTA 9.1 on BQ Aquaris E4.5.

[Michael S. (i-mich9el-s)]

The behavior is exactly as before: Unity launcher doesn't work. Starting the app via the application scope works.

[Michał Sawicz (saviq)]

Can you please show your output from the below on the phone:

$ system-image-cli -i

I just tried the steps from comment no. 5 above and can confirm that situation is fixed. Any chance you're seeing bug #1527737? Can you please describe the steps you're taking that lead to this behaviour for you?

[Michael S. (i-mich9el-s)]

phablet@ubuntu-phablet:~$ system-image-cli -i
current build number: 30
device name: krillin
channel: ubuntu-touch/stable/bq-aquaris.en
last update: 2016-02-24 21:46:53
version version: 30
version ubuntu: 20160217.1
version tag: OTA-9.1
version device: 20160108-efc96d8
version custom: 20160111-926-36--vivid

How to reproduce:
1) Wipe from the left, to get the unity launcher
2) Scroll to the top of the launcher bar
3) Tap on the "dekko" icon
4) Dekko doesn't start

[Michael S. (i-mich9el-s)]

See video attached to https://bugs.launchpad.net/dekko/+bug/1543744
The is exact the same behavior now with OTA 9.1

[Michael S. (i-mich9el-s)]

Attached a video I've just taken, which clearly shows, that in OTA 9.1 the bug is NOT fixed.

[Michał Sawicz (saviq)]

OK that's the symptom, not the cause, I assume when you reboot it works fine, so any steps you can think of that lead to this situation?

I mean, restart the phone, start dekko from launcher - I suppose it works then? What did you do to get to the state where it doesn't launch from the launcher any more?

Also, there's no need to use capitals. As you can see we're trying to resolve this issue for you, not trying to dismiss it.

[Michael S. (i-mich9el-s)]

After reboot the phone will work fine again. I dont now how to reproduce, but my suspicion is, that multiple restarts of dekko (after moving from one network to another dekko does not to receive emails - see #1520693) causes the problem. At the moment dekko is the only app involved by this issue.

[Michael S. (i-mich9el-s)]

This issue exists furthermore. It still occurs with OTA 10.1 on BQ Aquaris E4.5.
Dekko refuses startup frequently when using the unity launcher.

[Pat McGowan (pat-mcgowan)]

Opened bug #1577793 as this seems specific to dekko