Bug 481255

phonon-backend-xine is default for a reason (gstreamer one still has various issues).  That said, if the gstreamer backend works for you, great.

We've had quite a few reports of gnome users unable to use the xine-backend, as you report here, but to date, have been unable to reproduce the problem.

In the meantime, if you'd be willing to help us diagnose, that would be great.

1. What DE are you using (gnome, kde, other)?

2.  Are you using PulseAudio?  if so, please verify that it is running and audio is otherwise playing ok.

3. what does this output:
rpm -q amarok phonon-backend-xine xine-lib-pulseaudio

and,

0.  yum groupupdate sound-and-video
does this command install anything new?  If so, what was previously missing?

1. Gnome

2. Yes. Audio works fine in almost all cases (MythTV still doesn't play nice). Programs that support Pulseaudio play fine and those that use the alsa plugin do fine as well. AC3 passthrough also functions as it should.

3. I'll have to get back to you on this one after work.

4. I'll try this when I get home but I don't expect it to do anything as this was a fresh install other than preserving my home directory from F9.

3. [richard@hobbes ~]$ rpm -q amarok phonon-backend-xine xine-lib-pulseaudio
amarok-2.0.1.1-1.fc10.x86_64
phonon-backend-xine-4.1.4-2.fc10.x86_64
xine-lib-pulseaudio-1.1.16-1.fc10.x86_64

4. Here's the packages it wants to install:

Installing:
 gstreamer-ffmpeg     x86_64 0.10.5-1.fc10         rpmfusion-free         156 k
 gstreamer-plugins-ugly
                      x86_64 0.10.10-2.fc10        rpmfusion-free-updates 319 k
 k3b-extras-freeworld x86_64 1.0.5-4.fc10          rpmfusion-free          64 k
 rhythmbox            x86_64 0.11.6-17.r6096.fc10  updates                4.5 M
Installing for dependencies:
 gstreamer-python     x86_64 0.10.12-1.fc10        fedora                 314 k
 libsidplay           x86_64 1.36.57-17            fedora                  91 k
---

I'm wondering if this is a byproduct of another bug[1][2] where using the pulseaudio xine library causes xine to segfault?

It looks like Lennart had a fix[2] for this on 12/16 but xine still segaults for me.

I went ahead with the groupupdate sound-and-video but xine still segfaults.

[1] https://bugzilla.rpmfusion.org/show_bug.cgi?id=125
[2] https://bugzilla.redhat.com/show_bug.cgi?id=473080

xine segfault should be addressed by xine-lib-1.1.16.1 update, 
https://admin.fedoraproject.org/updates/F10/FEDORA-2009-0884
for bug #480504

That said, I'm fairly certain that's a completely separate issue.

Do you have any other xine-lib-using apps to use as a test case?  (maybe with the aforementioned update, you could try xine again, or perhaps try kaffeine).

Well I tried Miro which uses Xine for playback and it worked fine...

The segault problem bothers me though since I'm updated to 1.1.16-1.FC10 and it's still happening.

Try xine-lib-1.1.16.1 (per comment #5)?

Sorry, got confused between .1 and -1. I updated and it pulled in a bunch of i386 files... 

Xine no longer segfaults but I removed phonon-backend-gstreamer to see if Amarok worked and I'm back to no audio.

Still getting the following errors:
WARNING: bool Phonon::FactoryPrivate::createBackend() phonon backend plugin could not be loaded 
WARNING: bool Phonon::FactoryPrivate::createBackend() phonon backend plugin could not be loaded 
WARNING: bool Phonon::FactoryPrivate::createBackend() phonon backend plugin could not be loaded 
WARNING: bool Phonon::FactoryPrivate::createBackend() phonon backend plugin could not be loaded 
WARNING: bool Phonon::FactoryPrivate::createBackend() phonon backend plugin could not be loaded 
WARNING: bool Phonon::FactoryPrivate::createBackend() phonon backend plugin could not be loaded 

I remember in older versions you could pick your playback engine but that options eems to no longer be available.

phonon now controls backend (it's no longer amarok specific): 
systemsettings -> multimedia

(systemsettings is in kdebase-workspace, if you don't happen to have that installed).

Now, to discover wtf is causing these: 
WARNING: bool Phonon::FactoryPrivate::createBackend() phonon backend plugin
could not be loaded 

(reassigning to phonon)

SELinux problem?

Try:
su -c "setenforce 0"

If that helps, you can configure SELinux to permissive or disabled in system-config-selinux.

No luck with setenforce 0...  I'm running Gnome so I don't seem to have the setting app. Is there a way to do it from the command line?

Created attachment 329964 [details]
Valgrind output of amarok

Unfortunately there's no useful information in that Valgrind log. So the bug does not look like a memory issue.

Yeah, I didn't see much in there either but I figured it was worth a try. Is there a way to get more useful output from Phonon?

adjusting summary, I'll ping some upstream folks for guidance.

After completely removing qt/kde, and re-installing only amarok under gnome, I was finally able to reproduce, esp with some additional adivce from #phonon, to run with evn var:  PHONON_DEBUG=1

Richard, try
yum install kdebase-runtime

Seems that phonon is supposed to be able to function without it, but (for whatever reason) doesn't atm.

In the meantime, we'll explore how to fix this properly.

The xine-lib backend in KDE 4.1 is a KDE plugin. This should be fixed in KDE 4.2 / phonon 4.3 where it's a qt-only plugin (part of Phonon itself).

Woo, confirmed better/fixed with phonon-4.3.0 (coming with kde-4.2.0)

phonon upstream also said phonon-4.2.1 includes a fix for this issue too.  (except it's only tagged, with no tarball... yet).  boo.

At this point, I'd say don't bother, let's go directly to 4.3.0.

Thanks, installing kdebase-runtime fixed it for me.

kdeutils-4.2.0-1.fc10, kdetoys-4.2.0-1.fc10, kdesdk-4.2.0-1.fc10, kdeplasma-addons-4.2.0-1.fc10, kdepimlibs-4.2.0-1.fc10, kdepim-4.2.0-2.fc10, kdenetwork-4.2.0-2.fc10, kdemultimedia-4.2.0-1.fc10.1, kdegraphics-4.2.0-1.fc10, kdegames-4.2.0-1.fc10, kdeedu-4.2.0-2.fc10, kdebase-runtime-4.2.0-3.fc10, kdebase-4.2.0-2.fc10, kdebindings-4.2.0-1.fc10, kdeartwork-4.2.0-1.fc10, kdeadmin-4.2.0-1.fc10.1, kdeaccessibility-4.2.0-1.fc10, soprano-2.2.1-1.fc10, strigi-0.6.3-1.fc10, akonadi-1.1.1-1.fc10, automoc-1.0-0.11.rc3.fc10, compiz-0.7.8-7.fc10, kde-settings-4.1-5.20090126svn.fc10, kde-plasma-runcommand-1.0-1.fc10, kde-plasma-quickaccess-0.7.1-7.fc10, kdebluetooth-0.3-1.fc10, kde-i18n-3.5.10-2.fc10, krazy2-2.8-7.20090127svn.fc10, phonon-4.3.0-5.fc10, kde-l10n-4.2.0-2.fc10, kdelibs-4.2.0-7.fc10, kdebase-workspace-4.2.0-4.fc10.2 has been pushed to the Fedora 10 testing repository.  If problems still persist, please make note of it in this bug report.
 If you want to test the update, you can install it with 
 su -c 'yum --enablerepo=updates-testing update kdeutils kdetoys kdesdk kdeplasma-addons kdepimlibs kdepim kdenetwork kdemultimedia kdegraphics kdegames kdeedu kdebase-runtime kdebase kdebindings kdeartwork kdeadmin kdeaccessibility soprano strigi akonadi automoc compiz kde-settings kde-plasma-runcommand kde-plasma-quickaccess kdebluetooth kde-i18n krazy2 phonon kde-l10n kdelibs kdebase-workspace'.  You can provide feedback for this update here: http://admin.fedoraproject.org/updates/F10/FEDORA-2009-1387

kdeutils-4.2.0-1.fc10, kdetoys-4.2.0-1.fc10, kdesdk-4.2.0-1.fc10, kdeplasma-addons-4.2.0-1.fc10, kdepimlibs-4.2.0-1.fc10, kdepim-4.2.0-2.fc10, kdenetwork-4.2.0-2.fc10, kdemultimedia-4.2.0-1.fc10.1, kdegraphics-4.2.0-1.fc10, kdegames-4.2.0-1.fc10, kdebase-runtime-4.2.0-3.fc10, kdebase-4.2.0-2.fc10, kdebindings-4.2.0-1.fc10, kdeartwork-4.2.0-1.fc10, kdeadmin-4.2.0-1.fc10.1, kdeaccessibility-4.2.0-1.fc10, soprano-2.2.1-1.fc10, strigi-0.6.3-1.fc10, akonadi-1.1.1-1.fc10, automoc-1.0-0.11.rc3.fc10, compiz-0.7.8-7.fc10, kde-settings-4.1-5.20090126svn.fc10, kde-plasma-runcommand-1.0-1.fc10, kde-plasma-quickaccess-0.7.1-7.fc10, kdebluetooth-0.3-1.fc10, kde-i18n-3.5.10-2.fc10, krazy2-2.8-7.20090127svn.fc10, phonon-4.3.0-5.fc10, kdelibs-4.2.0-9.fc10, kdeedu-4.2.0-5.fc10, kde-l10n-4.2.0-2.fc10, kdebase-workspace-4.2.0-4.fc10.2 has been pushed to the Fedora 10 testing repository.  If problems still persist, please make note of it in this bug report.
 If you want to test the update, you can install it with 
 su -c 'yum --enablerepo=updates-testing update kdeutils kdetoys kdesdk kdeplasma-addons kdepimlibs kdepim kdenetwork kdemultimedia kdegraphics kdegames kdebase-runtime kdebase kdebindings kdeartwork kdeadmin kdeaccessibility soprano strigi akonadi automoc compiz kde-settings kde-plasma-runcommand kde-plasma-quickaccess kdebluetooth kde-i18n krazy2 phonon kdelibs kdeedu kde-l10n kdebase-workspace'.  You can provide feedback for this update here: http://admin.fedoraproject.org/updates/F10/FEDORA-2009-1387

kdeutils-4.2.0-1.fc10, kdetoys-4.2.0-1.fc10, kdesdk-4.2.0-1.fc10, kdeplasma-addons-4.2.0-1.fc10, kdepimlibs-4.2.0-1.fc10, kdepim-4.2.0-2.fc10, kdenetwork-4.2.0-2.fc10, kdemultimedia-4.2.0-1.fc10.1, kdegraphics-4.2.0-1.fc10, kdegames-4.2.0-1.fc10, kdebase-runtime-4.2.0-3.fc10, kdebase-4.2.0-2.fc10, kdebindings-4.2.0-1.fc10, kdeartwork-4.2.0-1.fc10, kdeadmin-4.2.0-1.fc10.1, kdeaccessibility-4.2.0-1.fc10, soprano-2.2.1-1.fc10, strigi-0.6.3-1.fc10, akonadi-1.1.1-1.fc10, automoc-1.0-0.11.rc3.fc10, compiz-0.7.8-7.fc10, kde-plasma-runcommand-1.0-1.fc10, kde-plasma-quickaccess-0.7.1-7.fc10, kdebluetooth-0.3-1.fc10, kde-i18n-3.5.10-2.fc10, krazy2-2.8-7.20090127svn.fc10, kde-settings-4.1-6.20090206svn.fc10, phonon-4.3.0-5.fc10, kdelibs-4.2.0-9.fc10, kdeedu-4.2.0-5.fc10, kde-l10n-4.2.0-2.fc10, kdebase-workspace-4.2.0-4.fc10.2 has been pushed to the Fedora 10 testing repository.  If problems still persist, please make note of it in this bug report.
 If you want to test the update, you can install it with 
 su -c 'yum --enablerepo=updates-testing update kdeutils kdetoys kdesdk kdeplasma-addons kdepimlibs kdepim kdenetwork kdemultimedia kdegraphics kdegames kdebase-runtime kdebase kdebindings kdeartwork kdeadmin kdeaccessibility soprano strigi akonadi automoc compiz kde-plasma-runcommand kde-plasma-quickaccess kdebluetooth kde-i18n krazy2 kde-settings phonon kdelibs kdeedu kde-l10n kdebase-workspace'.  You can provide feedback for this update here: http://admin.fedoraproject.org/updates/F10/FEDORA-2009-1387