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 Desktop Packages, which is subscribed to rhythmbox in Ubuntu. https://bugs.launchpad.net/bugs/1307793 Title: 14.04 rhythmbox freezes when going backwards a song (.m4a). Status in rhythmbox package in Ubuntu: New Bug description: I have not been able to replicate this bug on MP3 files, only on m4a audio files I have taken from youtube. a: open Rhythmbox b: play /m4a songs c: press back either by keyboard shortcut, the control under the sound control, or the dialogue on the dash icon. d: Program freezes ~~Also may have caused my dash search to stop working.~~ Edit: I retested; My unity search was not affected when I retested. 1) The release of Ubuntu you are using, via 'lsb_release -rd' or System -> About Ubuntu akiva@Akiva-ThinkPad:~$ lsb_release -rd Description: Ubuntu 14.04 LTS Release: 14.04 2) The version of the package you are using, via 'apt-cache policy pkgname' or by checking in Software Center akiva@Akiva-ThinkPad:~$ apt-cache policy rhythmbox rhythmbox: Installed: 3.0.2-0ubuntu1 Candidate: 3.0.2-0ubuntu1 Version table: *** 3.0.2-0ubuntu1 0 500 http://ca.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages 100 /var/lib/dpkg/status 3) What you expected to happen Press backwards to play the previous song 4) What happened instead When backwards was pressed, the program hung, and had to be killed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/rhythmbox/+bug/1307793/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp