This bug has finally improved in Ubuntu 17.04. There are only 2 errors
left:
# update-mime-database /usr/share/mime
Unknown media type in type 'all/all'
Unknown media type in type 'all/allfiles'
However it is not clear to me which file is responsible for this:
# grep -r all/allfiles
Public bug reported:
On some video files (mp4 and others, depending on most used codecs) a black
frame arises after a couple of seconds. The time between these glitches isn't
constantly. The media player VLC, Kaffeine and the Dragon player have this
behavior, Xine and Mplayer not.
Additionally
Additionally the /home/*-environment (.config, .kde and other
directories) was taken over from Kubuntu 14.04.5 while installing the
core of 17.04.
** Information type changed from Private to Public
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Bugs, which is