Thanks for the attention. I wasn't sure at all which package I should choose, and Amarok seemed like a decent guess. I don't have a Phonon VLC backend installed at all; only the gstreamer backend.
The gstreamer package versions I have installed are shown in the apt log; the following versions allow Amarok to play MP3s, and were installed on my system prior to that 'apt full-upgrade' run: gstreamer1.0-libav:amd64 1.8.2-1~ubuntu1 gstreamer1.0-plugins-base:amd64 1.8.2-1ubuntu0.2 gstreamer1.0-plugins-good:amd64 1.8.2-1ubuntu0.3 gstreamer1.0-pulseaudio:amd64 1.8.2-1ubuntu0.3 gstreamer1.0-x:amd64 1.8.2-1ubuntu0.2 libgstreamer-plugins-base1.0-0:amd64 1.8.2-1ubuntu0.2 libgstreamer-plugins-good1.0-0:amd64 1.8.2-1ubuntu0.3 libgstreamer1.0-0:amd64 1.8.2-1~ubuntu1 Those were upgraded to the following versions, some combination of which breaks Amarok: gstreamer1.0-libav:amd64 1.8.3-1ubuntu0.1 gstreamer1.0-plugins-base:amd64 1.8.3-1ubuntu0.1 gstreamer1.0-plugins-good:amd64 1.8.3-1ubuntu0.3 gstreamer1.0-pulseaudio:amd64 1.8.3-1ubuntu0.3 gstreamer1.0-x:amd64 1.8.3-1ubuntu0.1 libgstreamer-plugins-base1.0-0:amd64 1.8.3-1ubuntu0.1 libgstreamer-plugins-good1.0-0:amd64 1.8.3-1ubuntu0.3 libgstreamer1.0-0:amd64 1.8.3-1~ubuntu0.1 I haven't been able to narrow down exactly which of these 8 packages is/are responsible. I also have gstreamer 0.10.x packages installed, and I think those might have been pulled in by Steam, but none of those were upgraded as part of this 'apt full-upgrade' run. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1661739 Title: Amarok can no longer play MP3s after gstreamer update To manage notifications about this bug go to: https://bugs.launchpad.net/amarok/+bug/1661739/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs