I am also able to reproduce this issue. I was unable to find any updated bug threads, so apologies in advance for a depracated update to this report.
The .m4a files in question all came from YouTube, via youtube-dl. I also cannot duplicate the issue with .mp3 files. 1) Output of 'lsb_release -rd': Description: Ubuntu 14.04.1 LTS Release: 14.04 2) Package version via 'apt-cache policy rhythmbox' rhythmbox: Installed: 3.0.2-0ubuntu2 Candidate: 3.0.2-0ubuntu2 Version table: *** 3.0.2-0ubuntu2 0 500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages 100 /var/lib/dpkg/status 3.0.2-0ubuntu1 0 500 http://us.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages 3) What you expected to happen Scroll forward in time via slider, advancing further into .m4a track 4) What happened instead Rhythmbox becomes unresponsive and Ubuntu prompts to wait or kill. I've waited for several minutes with no luck. Killing the program and restarting is the only way to recover. Note: It appears Videos is experiencing the same issue when playing .m4a files taken from YouTube; which makes me wonder if the problem is exclusive to YouTube or youtube-dl. -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to rhythmbox in Ubuntu. https://bugs.launchpad.net/bugs/1307793 Title: 14.04 rhythmbox freezes when going backwards a song (.m4a). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/rhythmbox/+bug/1307793/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs