Are you using the vanilla version of Ubuntu?(that’s what I’m testing on) And the version of Picard is 1.3.2? Cause that’s the version Ubuntu 16.04.4 gave me.
Anyway this is what I get after doing picard --debug in VirtualBox with vanilla Ubuntu 16.04.4:
abcd@abcd-VirtualBox:~$ picard --debug
No value set for `/desktop/gnome/interface/icon_theme’
D: 12:15:43 Debug mode on
D: 12:15:43 Starting Picard from ‘/usr/lib/picard/picard/tagger.pyc’
D: 12:15:43 Platform: Linux-4.13.0-36-generic-x86_64-with-Ubuntu-16.04-xenial CPython 2.7.12
D: 12:15:43 Versions: Picard 1.3.2, PyQt 4.11.4, Mutagen 1.31, Discid discid 1.1.0 (compat layer from python-libdiscid 0.4.1), libdiscid 0.6.1
D: 12:15:43 Configuration file path: /home/abcd/.config/MusicBrainz/Picard.conf
D: 12:15:43 User directory: /home/abcd/.config/MusicBrainz/Picard
D: 12:15:43 Using locale ‘LC_CTYPE=en_US.UTF-8;LC_NUMERIC=sv_SE.UTF-8;LC_TIME=sv_SE.UTF-8;LC_COLLATE=en_US.UTF-8;LC_MONETARY=sv_SE.UTF-8;LC_MESSAGES=en_US.UTF-8;LC_PAPER=sv_SE.UTF-8;LC_NAME=sv_SE.UTF-8;LC_ADDRESS=sv_SE.UTF-8;LC_TELEPHONE=sv_SE.UTF-8;LC_MEASUREMENT=sv_SE.UTF-8;LC_IDENTIFICATION=sv_SE.UTF-8’
D: 12:15:43 Loading gettext translation, localedir=‘/usr/share/locale’
D: 12:15:43 Loading gettext translation (picard-countries), localedir=‘/usr/share/locale’
D: 12:15:43 IOError(2, ‘No translation file found for domain’)
D: 12:15:43 _ = <function at 0x7f0135156488>
D: 12:15:43 N_ = <function at 0x7f0139020c80>
D: 12:15:43 ungettext = <function _ungettext at 0x7f0135156500>
D: 12:15:43 ugettext_countries = <function _ugettext_countries at 0x7f0135156578>
D: 12:15:43 ugettext_attributes = <function _ugettext_attributes at 0x7f01351565f0>
D: 12:15:43 NetworkDiskCache dir: /home/abcd/.cache/MusicBrainz/Picard/picard/
D: 12:15:43 NetworkDiskCache size: 0 / 104857600
D: 12:15:43 Looking for plugins in directory ‘/usr/lib/picard/picard/plugins’, 17 names found
D: 12:15:43 Loading plugin u’Add Cluster As Release’ version 0.5, compatible with API: 1.0
D: 12:15:43 Loading plugin u’Album Artist Website’ version 0.3, compatible with API: 0.15, 0.15.1, 0.16, 1.0, 1.1, 1.2, 1.3
D: 12:15:43 Loading plugin ‘Classic Disc Numbers’ version 0.1, compatible with API: 0.15
D: 12:15:43 Loading plugin u’Generate Cuesheet’ version 0.1, compatible with API: 0.15
D: 12:15:43 Loading plugin ‘Disc Numbers’ version 0.1, compatible with API: 0.15
D: 12:15:43 Loading plugin ‘Feat. Artists Removed’ version 0.2, compatible with API: 0.15, 0.16
D: 12:15:43 Loading plugin ‘Feat. Artists in Titles’ version 0.2, compatible with API: 0.15, 0.16
D: 12:15:43 Loading plugin u’Last.fm’ version 0.4, compatible with API: 0.15
D: 12:15:43 Loading plugin u’Last.fm.Plus’ version 0.14, compatible with API: 0.15
D: 12:15:43 Loading plugin u’No release’ version 0.1, compatible with API: 0.15
D: 12:15:43 Loading plugin ‘Release Type’ version 1.2, compatible with API: 0.15
D: 12:15:43 Loading plugin u’ReplayGain’ version 0.1, compatible with API: 0.15, 0.16
D: 12:15:43 Loading plugin u’Sort Multi-Value Tags’ version 0.1, compatible with API: 0.15
D: 12:15:43 Loading plugin u’Standardise Performers’ version 0.2, compatible with API: 0.15, 0.15.1, 0.16, 1.0, 1.1, 1.2, 1.3
D: 12:15:43 Loading plugin ‘Title Case’ version 0.1, compatible with API: 0.15
D: 12:15:43 Loading plugin u’Copy Cluster to Clipboard’ version 0.1, compatible with API: 0.15
D: 12:15:43 Loading plugin u’View script variables’ version 0.5, compatible with API: 1.0
W: 12:15:43 Plugin directory ‘/usr/lib/picard/contrib/plugins’ doesn’t exist
D: 12:15:43 Looking for plugins in directory ‘/home/abcd/.config/MusicBrainz/Picard/plugins’, 0 names found
D: 12:15:44 Starting the browser integration (127.0.0.1:8000)