bonjour,
>_ clementine --verbose -l -p 'unmp3.mp3'
14:04:46.128 WARN unknown libpng warning: iCCP: known incorrect sRGB profile
14:04:46.448 WARN unknown QPainter::begin: Paint device returned engine == 0, type: 2
14:04:46.604 WARN unknown "sni-qt/14928" WARN 14:04:46.604 void StatusNotifierItemFactory::connectToSnw() Invalid interface to SNW_SERVICE
14:04:46.604 WARN unknown No systemtrayicon available
14:04:46.605 WARN unknown Object::connect: No such signal QtSingleApplication::messageReceived(QByteArray)
14:04:46.605 WARN unknown Object::connect: (sender name: 'clementine')
14:04:46.605 WARN unknown Object::connect: (receiver name: 'MainWindow')
14:04:48.868 ERROR unknown JSonScanner::yylex - error while reading from io device
14:04:48.868 ERROR unknown json_parser - syntax error found, forcing abort, Line 1 Column 1
Aucun retour graphique non plus, fedora 27 a jour, gnome, wayland, pas de CG. Par contre la lecture est ok, l'OSD gnome shell aussi. avec Xorg, la commande ne renvois absolument rien, pas d'interface non plus.