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@thorhop
Created February 1, 2015 04:18
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Missing phonon4qt5_backend
kf5.kservice.sycoca: Trying to open ksycoca from "/home/thor/.cache/ksycoca5"
"/home/thor/.config/kde.org/libphonon.conf"
libpaths ("/nix/store/gd42yr6s93v2bssyxns9f7hq7kp3lgw1-phonon-4.8.1/lib/qt5/plugins", "/nix/store/5k4r5aqrbx4xkxsr7afz1rpmczxdyjka-qt-5.3.2/plugins", "/nix/store/1r59mnbb4dm0y7n7ih68azm4q8zq45r2-kde-cli-tools-5.1.2/bin", "/nix/store/lqsk6jxaa1ha61mkwwcj4pk38393528y-qt-4.8.6/lib/qt4/plugins", "/nix/store/s89ssjg8s2r9lvll852v4rxw3z3kk5w9-system-path/lib/kde4/plugins", "/nix/store/s89ssjg8s2r9lvll852v4rxw3z3kk5w9-system-path/lib/qt5/plugins")
void BackendSelection::load() "/nix/store/gd42yr6s93v2bssyxns9f7hq7kp3lgw1-phonon-4.8.1/lib/qt5/plugins/phonon4qt5_backend" does not exist
void BackendSelection::load() "/nix/store/5k4r5aqrbx4xkxsr7afz1rpmczxdyjka-qt-5.3.2/plugins/phonon4qt5_backend" does not exist
void BackendSelection::load() "/nix/store/1r59mnbb4dm0y7n7ih68azm4q8zq45r2-kde-cli-tools-5.1.2/bin/phonon4qt5_backend" does not exist
void BackendSelection::load() "/nix/store/lqsk6jxaa1ha61mkwwcj4pk38393528y-qt-4.8.6/lib/qt4/plugins/phonon4qt5_backend" does not exist
void BackendSelection::load() "/nix/store/s89ssjg8s2r9lvll852v4rxw3z3kk5w9-system-path/lib/kde4/plugins/phonon4qt5_backend" does not exist
qooooooooo
"/home/thor/.config/kde.org/libphonon.conf"
libpaths ("/nix/store/gd42yr6s93v2bssyxns9f7hq7kp3lgw1-phonon-4.8.1/lib/qt5/plugins", "/nix/store/5k4r5aqrbx4xkxsr7afz1rpmczxdyjka-qt-5.3.2/plugins", "/nix/store/1r59mnbb4dm0y7n7ih68azm4q8zq45r2-kde-cli-tools-5.1.2/bin", "/nix/store/lqsk6jxaa1ha61mkwwcj4pk38393528y-qt-4.8.6/lib/qt4/plugins", "/nix/store/s89ssjg8s2r9lvll852v4rxw3z3kk5w9-system-path/lib/kde4/plugins", "/nix/store/s89ssjg8s2r9lvll852v4rxw3z3kk5w9-system-path/lib/qt5/plugins")
void BackendSelection::load() "/nix/store/gd42yr6s93v2bssyxns9f7hq7kp3lgw1-phonon-4.8.1/lib/qt5/plugins/phonon4qt5_backend" does not exist
void BackendSelection::load() "/nix/store/5k4r5aqrbx4xkxsr7afz1rpmczxdyjka-qt-5.3.2/plugins/phonon4qt5_backend" does not exist
void BackendSelection::load() "/nix/store/1r59mnbb4dm0y7n7ih68azm4q8zq45r2-kde-cli-tools-5.1.2/bin/phonon4qt5_backend" does not exist
void BackendSelection::load() "/nix/store/lqsk6jxaa1ha61mkwwcj4pk38393528y-qt-4.8.6/lib/qt4/plugins/phonon4qt5_backend" does not exist
void BackendSelection::load() "/nix/store/s89ssjg8s2r9lvll852v4rxw3z3kk5w9-system-path/lib/kde4/plugins/phonon4qt5_backend" does not exist
qooooooooo
qooooooooo
context_state_callback "Terminated"
context_state_callback "Terminated"
context_state_callback "Terminated"
Doing update 0
Got info about card "Built-in Audio"
Doing update 0
Got info about card "Built-in Audio"
Got info about sink "Built-in Audio Digital Stereo (HDMI)"
Got info about sink "Built-in Audio Analog Stereo"
"Want ID: No; Have ID: No"
Got info about source "Built-in Audio Analog Stereo"
"Want ID: No; Have ID: No"
"Updating ports for device 'Built-in Audio Digital Stereo (HDMI)' (1 ports available)"
Doing update 0
"Updating ports for device 'Built-in Audio Digital Stereo (HDMI)' (1 ports available)"
(kcmshell5:5769): GStreamer-CRITICAL **: gst_object_ref_sink: assertion 'object != NULL' failed
(kcmshell5:5769): GStreamer-CRITICAL **: gst_object_ref_sink: assertion 'object != NULL' failed
(kcmshell5:5769): GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
(kcmshell5:5769): GStreamer-CRITICAL **: gst_bin_add: assertion 'GST_IS_ELEMENT (element)' failed
(kcmshell5:5769): GStreamer-CRITICAL **: gst_element_get_static_pad: assertion 'GST_IS_ELEMENT (element)' failed
(kcmshell5:5769): GStreamer-CRITICAL **: gst_ghost_pad_new: assertion 'GST_IS_PAD (target)' failed
(kcmshell5:5769): GStreamer-CRITICAL **: gst_element_add_pad: assertion 'GST_IS_PAD (pad)' failed
(kcmshell5:5769): GStreamer-CRITICAL **: gst_object_unref: assertion 'object != NULL' failed
(kcmshell5:5769): GStreamer-CRITICAL **: gst_bin_add: assertion 'GST_IS_ELEMENT (element)' failed
(kcmshell5:5769): GStreamer-CRITICAL **: gst_element_get_static_pad: assertion 'GST_IS_ELEMENT (element)' failed
(kcmshell5:5769): GStreamer-CRITICAL **: gst_ghost_pad_new: assertion 'GST_IS_PAD (target)' failed
(kcmshell5:5769): GStreamer-CRITICAL **: gst_element_add_pad: assertion 'GST_IS_PAD (pad)' failed
(kcmshell5:5769): GStreamer-CRITICAL **: gst_object_unref: assertion 'object != NULL' failed
WARNING: Phonon::createPath: Cannot connect Phonon::MediaObject ( no objectName ) to Phonon::AudioOutput ( no objectName ).
KCrash: Application 'kcmshell5' crashing...
KCrash: Attempting to start /run/current-system/sw/lib/libexec/drkonqi from kdeinit
sock_file=/run/user/1000/kdeinit5__0
@ttuegel
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ttuegel commented Feb 1, 2015

If you look carefully, you can infer that the GStreamer backend is eventually loaded from /nix/store/s89ssjg8s2r9lvll852v4rxw3z3kk5w9-system-path/lib/qt5/plugins, i.e. the system profile, which is the correct location. It does load GStreamer, but there is some problem with it. Could you try reproducing this with PHONON_GST_DEBUG=5? There are instructions at the KDE Techbase.

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