Rhythmbox crashes when clicking on "Play" button

[Bajiru]

I am using Ubuntu 14.04.5 LTS. I purged Unity because it is really slow on my PC. I installed GNOME & KDE (kubuntu-desktop). Before I logged out from KDE because it was somehow slow, Rhythmbox played the music files just fine. However, when I logged in to GNOME Flashback (Metacity), I started Rhythmbox, and when I pressed the "Play" button on my keyboard, Rhythmbox crashed instead of playing the music file normally. Can anyone help me.

(Note: This only happens with Ubuntu 14.04 on my PC. Back when I was using Ubuntu 10.10 & 12.04, Rhythmbox worked OK.)

Ubuntu release (lsb_release -rd):

Description: Ubuntu 14.04.5 LTS
Release: 14.04

Version of Rhythmbox (apt-cache policy rhythmbox):

rhythmbox:
  Installed: 3.0.2-0ubuntu2
  Candidate: 3.0.2-0ubuntu2
  Release Table:
 *** 3.0.2-0ubuntu2 0
        500 http://gr.archive.ubuntu.com/ubuntu/ trusty-updates/main i386 Packages
        100 /var/lib/dpkg/status
     3.0.2-0ubuntu1 0
        500 http://gr.archive.ubuntu.com/ubuntu/ trusty/main i386 Packages

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: rhythmbox 3.0.2-0ubuntu2
ProcVersionSignature: Ubuntu 4.4.0-92.115~14.04.1-generic 4.4.76
Uname: Linux 4.4.0-92-generic i686
ApportVersion: 2.14.1-0ubuntu3.25
Architecture: i386
CurrentDesktop: GNOME Flashback (Metacity)
Date: Tue Aug 29 16:57:09 2017
ExecutablePath: /usr/bin/rhythmbox
InstallationDate: Installed on 2017-08-27 (1 days ago)
InstallationMedia: Ubuntu 14.04.5 LTS "Trusty Tahr" - Release i386 (20160803)
ProcEnviron:
 LANGUAGE=el
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=el_GR.UTF-8
 SHELL=/bin/bash
SourcePackage: rhythmbox
UpgradeStatus: No upgrade log present (probably fresh install)

[Paul White (paulw2u)]

We are sorry that we do not always have the capacity to review all reported bugs in a timely manner.

This release of Ubuntu is no longer receiving maintenance updates. If this is still an issue using a maintained version of Ubuntu please let us know otherwise this report can be left to expire in approximately 60 days time.

Paul White
[Ubuntu Bug Squad]

[Launchpad Janitor (janitor)]

[Expired for rhythmbox (Ubuntu) because there has been no activity for 60 days.]