SDK not able to provide further hint about missing apparmor policy

[XiaoGuo, Liu]

As miss the "audio" policy in the apparmor file. However, the output window produces the indirect error message instead of printing "missing audio policy" kind of error. Attached please find the error message:
============================
        MediaPlayer {
            id: player
            source: "sounds/blast.wav"
        }
============================
virtual void AalMediaPlayerControl::play()
virtual QMediaPlayer::MediaStatus AalMediaPlayerControl::mediaStatus() const
Cannot start playback without a valid media-hub player session
Cannot get current playback position without a valid media-hub player session
...

This kind of problem happens to the rest of the APIs as well. If we cannot output the correct clear information like "missing audio security policy", a developer has to spend a lot of time in figuring out what could be wrong. Sometimes, a developer may be misled to troubleshoot API usage instead of adding the correct security policies.

[Jamie Strandboge (jdstrand)]

The application is doing the right thing-- it is simply responding to what the kernel/dbus is doing, which is blocking access to media-hub. The SDK could look at /var/log/syslog for apparmor denials and display them to the user which could be helpful. Documentation could also help in this regard.

[XiaoGuo, Liu (liu-xiao-guo)]

I do not think a developer needs to open a terminal to check the syslog file, which is not practical. The error messages should be intuitive to developer to follow the right action.

[Rex Tsai (chihchun)]

A feature wish list would be qtcreator should recommand the developer to add `audio' policy group, if the developer added MediaPlayer or called QtMultimedia. Or check policy groups are added correctly from click-check-lint.

[Pat McGowan (pat-mcgowan)]

The feature request is certainly valid to add some helpful checks at some level. I like the suggestion in comment #6 to queue the developer based on calls they may have used that imply need for a permission. The first step might be documentation providing that mapping and then automation of a check.

[Benjamin Zeller (zeller-benjamin)]

I'm going to go with jdstrand's suggestion and show the syslog output on stderr, which shows up as red text in the application output.

[Launchpad Janitor (janitor)]

This bug was fixed in the package qtcreator-plugin-ubuntu - 3.1.1+15.10.20150616-0ubuntu1

---------------
qtcreator-plugin-ubuntu (3.1.1+15.10.20150616-0ubuntu1) wily; urgency=medium

  [ Benjamin Zeller ]
  * Fix Bug lp:1362028 "SDK not able to provide further hint about
    missing apparmor policy" (LP: #1362028)
  * Fix Bug lp:1455566 "ubuntu sdk references obsolete system-image
    channel names" (LP: #1455566)
  * Fix bug lp:1456627 "Almost unusuable while non-Ubuntu device
    connected through adb" (LP: #1456627)

  [ Marcus Tomlinson ]
  * Split scope template into "14.10" and "Current" variations (LP:
    #1464108)

  [ Nicholas Skaggs ]
  * Update qml based templates to best practicies

  [ Niklas Wenzel ]
  * Allow parallel builds using "dpkg-buildpackage -jN", reducing build
    time on multi-core CPUs (LP: #1465018)
  * Fix building translations (LP: #1257313)

  [ nskaggs ]
  * Update qml based templates to best practicies

 -- CI Train Bot <email address hidden> Tue, 16 Jun 2015 14:48:19 +0000