Hi all,

yesterday I decided to give 12.04 a try.
One surprise: the Dist-upgrade from 11.10 went without errors, this never worked for me.
Mostly all is working fine, except for Video Playback in Bangarang, only a black screen. Using VLC I see a stuttering video.
Was anybody as curious as me and installed 12.04 already with the same problem?

Which phonon-backend do you use? I suggest using the phonon-backend-vlc, although the phonon-backend-gstreamer should work as well if you have the ubuntu-restricted-extras package installed.

I had the same problem...

solution : enable the vsync in desktop effects.

finally I figured out, that if I start bangarang by clicking on a video file, the bangarang does not actually switch to play mode and the vid is paused. After starting play again, the video is played correctly.

My guess: The first try of bangarang to play the video fails and so it is paused (I think to see a short flickering), second try works.
But I have no idea how to debug this problem.

When I start from konsole:
user@user-ThinkPad-X220:~$ bangarang
QObject: Cannot create children for a parent that is in a different thread.
(Parent is Nepomuk::ResourceManager(0x9eec5c0), parent's thread is QThread(0x9b857e0), current thread is MusicListEngine(0xa2ec728)
Transitioning to state "ready"
Setting new source
New source: QUrl( "file:///home/user/Download/Vids/ttt/eeafde59989ee92751aab4323b178d.flv" )
Transitioning to state "playing"
Duration message
State change
Stream changed to file:///home/user/Download/Vids/ttt/eeafde59989ee92751aab4323b178d.flv
State change
Moving from "ready" 1 to "paused" 4
Moving from "paused" 4 to "playing" 2
Transitioning to state "ready"
State change
Moving from "playing" 2 to "paused" 4

** (bangarang:12033): WARNING **: gstvideo: failed to get caps of pad xvimagesink0:sink
State change
Moving from "paused" 4 to "ready" 1
Transitioning to state "ready"
QFSFileEngine::open: No file name specified
QFSFileEngine::open: No file name specified
QFSFileEngine::open: No file name specified
QFSFileEngine::open: No file name specified
Transitioning to state "ready"
Setting new source
New source: QUrl( "file:///home/user/Download/Vids/ttt/eeafde59989ee92751aab4323b178d.flv" )
Transitioning to state "playing"
Duration message
State change
Moving from "ready" 1 to "paused" 4
Stream changed to file:///home/user/Download/Vids/ttt/eeafde59989ee92751aab4323b178d.flv
QFSFileEngine::open: No file name specified
State change
QFSFileEngine::open: No file name specified
Moving from "paused" 4 to "playing" 2
QFSFileEngine::open: No file name specified
Transitioning to state "ready"
State change
Moving from "playing" 2 to "paused" 4

** (bangarang:12033): WARNING **: gstvideo: failed to get caps of pad xvimagesink0:sink
State change
Moving from "paused" 4 to "ready" 1
Transitioning to state "ready"
Transitioning to state "ready"

Unfortunately, the debugging symbols for bangarang (I guess it is the package "kde-baseapps-dbg") is not installable due to a missing dependency at the moment.
And: I am using phonon-gstreamer backend, as it is the standard