Yes is reproducible, so I start the program from terminal, first I was prompted to reconfigure the devices and then the players doesn't even play at all. I attach the output from terminal, I hope is helpful. lappy@lappy-laptop:~$ mixxx Debug: [Main]: Mixxx 1.8.0~beta2 "" is starting... Warning: [Main]: Configuration file is at version "1.7.2" and I don't know how to upgrade it to the current 1.8.0~beta2 (That means a function to do this needs to be added to upgrade.cpp.) -> Leaving the configuration file version as-is. Debug: [Main]: CachingReader using 4980736 bytes. Debug: [Main]: CachingReader using 4980736 bytes. Debug: [Main]: ControlObject::getControl returning NULL for ( "[Mixer Profile]" , "LoEQFrequency" ) Debug: [Main]: SampleRate 44100 Debug: [Main]: Latency 46 bt_audio_service_open: connect() failed: Connection refused (111) bt_audio_service_open: connect() failed: Connection refused (111) bt_audio_service_open: connect() failed: Connection refused (111) bt_audio_service_open: connect() failed: Connection refused (111) Debug: [Main]: ("QSQLITE", "QMYSQL3", "QMYSQL") Debug: [Main]: src/library/trackcollection.cpp DB status: true Debug: [Main]: QSqlError(-1, "", "") Debug: [Main]: SchemaManager::upgradeToSchemaVersion already at version 3 Debug: [Main]: TrackDAO::initialize QThread(0x95351e0, name = "Main") "qt_sql_default_connection" Debug: [Main]: CrateDAO::initialize() Debug: [Main]: CueDAO::initialize QThread(0x95351e0, name = "Main") "qt_sql_default_connection" Debug: [Main]: select() Debug: [Main]: idColumn 0 Debug: [Main]: Created MissingTracksModel! Debug: [Main]: select() Debug: [Main]: idColumn 0 Debug: [Main]: Promo dir: "/usr/share/mixxx//promo/1.8.0~beta2/index.html" Debug: [Main]: ITunesLibrary=[ "/home/lappy/.itunes.xml" ] Debug: [Main]: createWaveformViewer() Debug: [Main]: WaveformViewerFactory :: Creating new simple waveform Debug: [Main]: Didn't get mark Color, using parent's MarkerColor: "#0000ff" Debug: [Main]: Didn't get mark TextColor, using parent's BgColor: "#ffffff" Debug: [Main]: Didn't get mark Color, using parent's MarkerColor: "#0000ff" Debug: [Main]: Didn't get mark Color, using parent's MarkerColor: "#00ff00" Debug: [Main]: Didn't get mark Color, using parent's MarkerColor: "#0000ff" Debug: [Main]: Didn't get mark TextColor, using parent's BgColor: "#ffffff" Debug: [Main]: Didn't get mark Color, using parent's MarkerColor: "#0000ff" Debug: [Main]: Didn't get mark TextColor, using parent's BgColor: "#ffffff" Debug: [Main]: createWaveformViewer() Debug: [Main]: WaveformViewerFactory :: Creating new simple waveform Debug: [Main]: Didn't get mark Color, using parent's MarkerColor: "#ff0000" Debug: [Main]: Didn't get mark TextColor, using parent's BgColor: "#ffffff" Debug: [Main]: Didn't get mark Color, using parent's MarkerColor: "#ff0000" Debug: [Main]: Didn't get mark Color, using parent's MarkerColor: "#00ff00" Debug: [Main]: Didn't get mark Color, using parent's MarkerColor: "#ff0000" Debug: [Main]: Didn't get mark TextColor, using parent's BgColor: "#ffffff" Debug: [Main]: Didn't get mark Color, using parent's MarkerColor: "#ff0000" Debug: [Main]: Didn't get mark TextColor, using parent's BgColor: "#ffffff" Debug: [Main]: ControlObject::getControl returning NULL for ( "[Channel1]" , "hotcue_32_position" ) Debug: [Main]: ControlObject::getControl returning NULL for ( "[Channel2]" , "hotcue_32_position" ) Debug: [Main]: PlaylistTableModel::setPlaylist 1 Debug: [Main]: select() Debug: [Main]: idColumn 1 Debug: [Main]: WTrackTableView::loadTrackModel() PlaylistTableModel(0x9eec168) Debug: [Main]: select() Debug: [Main]: idColumn 1 Debug: [Main]: select() Debug: [Main]: idColumn 1 Debug: [Main]: select() Debug: [Main]: idColumn 0 Debug: [Main]: select() Debug: [Main]: idColumn 0 Debug: [Main]: WTrackTableView::loadTrackModel() PrepareLibraryTableModel(0xa06e298) Debug: [Main]: select() Debug: [Main]: idColumn 0 Debug: [Main]: select() Debug: [Main]: idColumn 0 Debug: [Main]: MixxxLibraryFeature::activate() Debug: [Main]: WTrackTableView::loadTrackModel() LibraryTableModel(0x96f9680) Debug: [Main]: select() Debug: [Main]: idColumn 0 Debug: [Main]: select() Debug: [Main]: idColumn 0 Debug: [Main]: WLibrary::switchToView "WTrackTableView" Debug: [Main]: Constructed LibraryScanner!!! Debug: [Main]: Could not read "/home/lappy/.mixxx/midi/MixxxMIDIDevices" Debug: [Main]: Scanning MIDI devices: Debug: [Main]: Found output device # 0 Midi Through Port-0 Debug: [Main]: Found input device # 1 Midi Through Port-0 Debug: [Main]: Linking to output device # 0 "Midi Through Port-0" Debug: [Main]: Starting script engine with output device "" Debug: [LibraryScanner 1]: LibraryHashDAO::initialize LibraryScanner(0x9c623b0, name = "LibraryScanner 1") "LIBRARY_SCANNER" Debug: [LibraryScanner 1]: CueDAO::initialize LibraryScanner(0x9c623b0, name = "LibraryScanner 1") "LIBRARY_SCANNER" Debug: [LibraryScanner 1]: TrackDAO::initialize LibraryScanner(0x9c623b0, name = "LibraryScanner 1") "LIBRARY_SCANNER" Debug: [LibraryScanner 1]: Legacy importer took 0 ms Debug: [MidiScriptEngine 1]: MIDI Device in script engine is: "" Debug: [Main]: MidiDeviceManager::getDeviceList Debug: [Main]: MidiDeviceManager: Setting up devices Debug: [Main]: PortMIDI device "1. Midi Through Port-0" already closed Debug: [Main]: MidiMapping: Loading MIDI preset from "/home/lappy/.mixxx/midi/Midi_Through_Port-0.midi.xml" Debug: [Main]: MidiOutputMappingTableModel::removeRows() Debug: [Main]: "Midi Through Port-0" settings found Debug: [MidiScriptEngine 1]: MidiScriptEngine: Loading & evaluating all MIDI script code Debug: [MidiScriptEngine 1]: MidiScriptEngine: Loading "/usr/share/mixxx/midi/midi-mappings-scripts.js" Debug: [Main]: MidiMapping: Input parsed! Debug: [Main]: MidiMapping: Output parsed! Debug: [Main]: Opening Device: "1._Midi_Through_Port-0" Debug: [Main]: MidiMapping::applyPreset() Debug: [Main]: MidiMapping: Processing MIDI Output Bindings for "Midi Through Port-0" Debug: [Main]: selectedAPI is: "ALSA" Debug: [Main]: getSliderLatencyMsec in: 11 Debug: [Main]: getSliderLatencyMsec out: 46 Debug: [Main]: loadSettings: 1 0 "SlowFade" Debug: [Main]: slotApply crossfader: 1 "SlowFade" Debug: [Main]: BpmSchemes::readXML "/home/lappy/.mixxx/mixxxbpmscheme.xml" Debug: [Main]: MidiDeviceManager::getDeviceList Debug: [Main]: MidiDeviceManager::getDeviceList Debug: [Main]: SoundManager::setupDevices() Debug: [Main]: Building timecode lookup tables... Allocating 2097152 slots (8192Kb) for 20 bit timecode (Serato 2nd Ed., side A) Debug: [Main]: Starting vinyl control xwax thread Debug: [Main]: Building timecode lookup tables... Allocating 2097152 slots (8192Kb) for 20 bit timecode (Serato 2nd Ed., side A) Debug: [LibraryScanner 1]: invalidateTrackLocations( "/home/lappy/Music" ) Debug: [Main]: Starting vinyl control xwax thread Debug: [Main]: SoundDevicePortAudio::open() "0, HDA Intel: ALC861-VD Analog (hw:0,0)" Debug: [Main]: m_dSampleRate 44100 Debug: [Main]: iLatencyMSec: 46 Debug: [Main]: output channels: 2 | input channels: 0 Debug: [Main]: iFramesPerBuffer 2048 Debug: [Main]: iLatencyMSec: 46 Debug: [Main]: Opening stream with id 0 Expression 'parameters->channelCount <= maxChans' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 916 Expression 'ValidateParameters( outputParameters, hostApi, StreamDirection_Out )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 1976 Debug: [Main]: Error opening stream: Invalid number of channels Debug: [LibraryScanner 1]: Recursively scanning library. Debug: [LibraryScanner 1]: Recursive scan finished cleanly. Debug: [LibraryScanner 1]: Marking unverified tracks as deleted. Debug: [LibraryScanner 1]: Detecting moved files. bt_audio_service_open: connect() failed: Connection refused (111) bt_audio_service_open: connect() failed: Connection refused (111) bt_audio_service_open: connect() failed: Connection refused (111) bt_audio_service_open: connect() failed: Connection refused (111) Debug: [LibraryScanner 1]: Scan finished cleanly Debug: [LibraryScanner 1]: Scan took: 7345 ms Debug: [Main]: select() Debug: [Main]: idColumn 0 Debug: [Main]: select() Debug: [Main]: idColumn 0 Debug: [MidiScriptEngine 1]: MidiScriptEngine shutting down... Debug: [Main]: Starting script engine with output device "1. Midi Through Port-0" Debug: [MidiScriptEngine 2]: MIDI Device in script engine is: "1. Midi Through Port-0" Debug: [Main]: MidiMapping::applyPreset() Debug: [MidiScriptEngine 2]: MidiScriptEngine: Loading & evaluating all MIDI script code Debug: [MidiScriptEngine 2]: MidiScriptEngine: Loading "/usr/share/mixxx/midi/midi-mappings-scripts.js" Debug: [Main]: MidiMapping: Processing MIDI Output Bindings for "Midi Through Port-0" Debug: [Main]: DlgPrefVinyl::Apply Debug: [Main]: in VinylGainSlotApply() with gain: 1 Debug: [Main]: DlgPrefSound::Apply Debug: [Main]: Setting ChannelMaster in config to: "0" Debug: [Main]: getSliderLatencyMsec in: 11 Debug: [Main]: getSliderLatencyMsec out: 46 Debug: [Main]: getSliderLatencyMsec in: 11 Debug: [Main]: getSliderLatencyMsec out: 46 Debug: [Main]: request msec 46 Debug: [Main]: SoundManager::setupDevices() Debug: [Main]: Building timecode lookup tables... Allocating 2097152 slots (8192Kb) for 20 bit timecode (Serato 2nd Ed., side A) Debug: [Main]: Starting vinyl control xwax thread Debug: [Main]: Building timecode lookup tables... Allocating 2097152 slots (8192Kb) for 20 bit timecode (Serato 2nd Ed., side A) Debug: [Main]: Starting vinyl control xwax thread Debug: [Main]: SoundDevicePortAudio::open() "0, HDA Intel: ALC861-VD Analog (hw:0,0)" Debug: [Main]: m_dSampleRate 44100 Debug: [Main]: iLatencyMSec: 46 Debug: [Main]: output channels: 2 | input channels: 0 Debug: [Main]: iFramesPerBuffer 2048 Debug: [Main]: iLatencyMSec: 46 Debug: [Main]: Opening stream with id 0 Debug: [Main]: Opened PortAudio stream successfully... starting Debug: [Main]: Dynamically loaded PortAudio library! Debug: [Main]: PortAudio: Started stream successfully Debug: [Main]: iNumDevicesOpenedForOutput: 1 Debug: [Main]: iNumDevicesOpenedForInput: 0 Debug: [Main]: slotApply crossfader: 1 "SlowFade" Debug: [Main]: MidiDeviceManager::getDeviceList Debug: [Main]: Writing MIDI preset file "/home/lappy/.mixxx/midi/Midi_Through_Port-0.midi.xml" bt_audio_service_open: connect() failed: Connection refused (111) bt_audio_service_open: connect() failed: Connection refused (111) bt_audio_service_open: connect() failed: Connection refused (111) bt_audio_service_open: connect() failed: Connection refused (111) Debug: [Main]: SoundManager::setupDevices() Debug: [Main]: Building timecode lookup tables... Allocating 2097152 slots (8192Kb) for 20 bit timecode (Serato 2nd Ed., side A) Debug: [Main]: Starting vinyl control xwax thread Debug: [Main]: Building timecode lookup tables... Allocating 2097152 slots (8192Kb) for 20 bit timecode (Serato 2nd Ed., side A) Debug: [Main]: Starting vinyl control xwax thread Debug: [Main]: SoundDevicePortAudio::open() "0, HDA Intel: ALC861-VD Analog (hw:0,0)" Debug: [Main]: m_dSampleRate 44100 Debug: [Main]: iLatencyMSec: 46 Debug: [Main]: output channels: 2 | input channels: 0 Debug: [Main]: iFramesPerBuffer 2048 Debug: [Main]: iLatencyMSec: 46 Debug: [Main]: Opening stream with id 0 Debug: [Main]: Opened PortAudio stream successfully... starting Debug: [Main]: Dynamically loaded PortAudio library! Debug: [Main]: PortAudio: Started stream successfully Debug: [Main]: iNumDevicesOpenedForOutput: 1 Debug: [Main]: iNumDevicesOpenedForInput: 0 Debug: [Main]: Qt v4.6.0 or higher detected. Using rebootMixxxView() workaround. (See bug https://bugs.launchpad.net/mixxx/+bug/521509) Debug: [Main]: Now in Rebootmixxview... Debug: [Main]: createWaveformViewer() Debug: [Main]: WaveformViewerFactory :: Creating new simple waveform Debug: [Main]: Didn't get mark Color, using parent's MarkerColor: "#0000ff" Debug: [Main]: Didn't get mark TextColor, using parent's BgColor: "#ffffff" Debug: [Main]: Didn't get mark Color, using parent's MarkerColor: "#0000ff" Debug: [Main]: Didn't get mark Color, using parent's MarkerColor: "#00ff00" Debug: [Main]: Didn't get mark Color, using parent's MarkerColor: "#0000ff" Debug: [Main]: Didn't get mark TextColor, using parent's BgColor: "#ffffff" Debug: [Main]: Didn't get mark Color, using parent's MarkerColor: "#0000ff" Debug: [Main]: Didn't get mark TextColor, using parent's BgColor: "#ffffff" Debug: [Main]: createWaveformViewer() Debug: [Main]: WaveformViewerFactory :: Creating new simple waveform Debug: [Main]: Didn't get mark Color, using parent's MarkerColor: "#ff0000" Debug: [Main]: Didn't get mark TextColor, using parent's BgColor: "#ffffff" Debug: [Main]: Didn't get mark Color, using parent's MarkerColor: "#ff0000" Debug: [Main]: Didn't get mark Color, using parent's MarkerColor: "#00ff00" Debug: [Main]: Didn't get mark Color, using parent's MarkerColor: "#ff0000" Debug: [Main]: Didn't get mark TextColor, using parent's BgColor: "#ffffff" Debug: [Main]: Didn't get mark Color, using parent's MarkerColor: "#ff0000" Debug: [Main]: Didn't get mark TextColor, using parent's BgColor: "#ffffff" Debug: [Main]: rebootgui DONE Warning: [Main]: Object::disconnect: No such signal MixxxApp::trackDropped(QString) in src/mixxx.cpp:1214 Warning: [Main]: Object::disconnect: No such signal MixxxApp::trackDropped(QString) in src/mixxx.cpp:1219 Debug: [Main]: Displaying mixxx Debug: [Main]: Running Mixxx Debug: [Main]: Track -1 set dirty Debug: [Main]: TrackInfoObject: emitting bpmUpdated signal! Debug: [Main]: setCuePoints 0 Debug: [Main]: Track 4592 set clean Debug: [Main]: getTrack hit the database, took 1 ms Debug: []: SSMP3::open() - Setting duration to: 688 Debug: []: Track 4592 set dirty Debug: [Main]: trackChanged 4592 Debug: [Main]: Row in this result set was updated. Signalling update. track: 4592 row: 2030 Debug: [Main]: trackChanged 4592 Debug: [Main]: Row in this result set was updated. Signalling update. track: 4592 row: 2152 Debug: [Main]: trackChanged 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: Row in this result set was updated. Signalling update. track: 4592 row: 105 Debug: [Main]: trackChanged 4592 Debug: [Main]: Row in this result set was updated. Signalling update. track: 4592 row: 2030 Debug: [Main]: trackChanged 4592 Debug: [Main]: Row in this result set was updated. Signalling update. track: 4592 row: 2152 Debug: [Main]: trackChanged 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: Row in this result set was updated. Signalling update. track: 4592 row: 105 Debug: [Main]: TrackInfoObject: emitting bpmUpdated signal! Debug: [Main]: trackChanged 4592 Debug: [Main]: Row in this result set was updated. Signalling update. track: 4592 row: 2030 Debug: [Main]: trackChanged 4592 Debug: [Main]: Row in this result set was updated. Signalling update. track: 4592 row: 2152 Debug: [Main]: trackChanged 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: Row in this result set was updated. Signalling update. track: 4592 row: 105 Debug: [Main]: trackChanged 4592 Debug: [Main]: Row in this result set was updated. Signalling update. track: 4592 row: 2030 Debug: [Main]: trackChanged 4592 Debug: [Main]: Row in this result set was updated. Signalling update. track: 4592 row: 2152 Debug: [Main]: trackChanged 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: Row in this result set was updated. Signalling update. track: 4592 row: 105 Debug: [Main]: Returning override for track 4592 Debug: [Main]: Returning override for track 4592 Debug: [Main]: Returning override for track 4592 Debug: [AnalyserQueue 1]: SSMP3::open() - Setting duration to: 688 Debug: [Main]: trackChanged 4592 Debug: [Main]: Row in this result set was updated. Signalling update. track: 4592 row: 2030 Debug: [Main]: trackChanged 4592 Debug: [Main]: Row in this result set was updated. Signalling update. track: 4592 row: 2152 Debug: [Main]: trackChanged 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: Row in this result set was updated. Signalling update. track: 4592 row: 105 Debug: [Main]: Returning override for track 4592 Debug: [Main]: Returning override for track 4592 Debug: [Main]: Returning override for track 4592 Debug: [AnalyserQueue 1]: AnalyserWaveform: f 44100 samplesPerDownsample: 110 downsamples 552332 from 60756480 Debug: [Main]: Returning override for track 4592 Debug: [Main]: Returning override for track 4592 Debug: [Main]: Returning override for track 4592 Debug: [Main]: Returning override for track 4592 Debug: [Main]: Returning override for track 4592 Debug: [Main]: Returning override for track 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: Row in this result set was updated. Signalling update. track: 4592 row: 2030 Debug: [Main]: trackChanged 4592 Debug: [Main]: Row in this result set was updated. Signalling update. track: 4592 row: 2152 Debug: [Main]: trackChanged 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: Row in this result set was updated. Signalling update. track: 4592 row: 105 Debug: [Main]: Returning override for track 4592 Debug: [AnalyserQueue 1]: AnalyserWavesummary generation successful for "Theo Parrish - Soul Control.mp3" Debug: [AnalyserQueue 1]: AnalyserWaveform :: Waveform downsampling finished. Debug: [AnalyserQueue 1]: AnalyserWaveform :: Generation took 10.91 seconds Debug: [AnalyserQueue 1]: BPM range is 70 to 140 Debug: [AnalyserQueue 1]: TrackInfoObject: emitting bpmUpdated signal! Debug: [AnalyserQueue 1]: AnalyserBPM BPM detection successful for "Theo Parrish - Soul Control.mp3" Debug: [AnalyserQueue 1]: AnalyserBPM BPM is 116.146 (raw: 116.146 ) Debug: [Main]: Returning override for track 4592 Debug: [Main]: Returning override for track 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: Row in this result set was updated. Signalling update. track: 4592 row: 2030 Debug: [Main]: trackChanged 4592 Debug: [Main]: Row in this result set was updated. Signalling update. track: 4592 row: 2152 Debug: [Main]: trackChanged 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: trackChanged 4592 Debug: [Main]: Row in this result set was updated. Signalling update. track: 4592 row: 105 Debug: [Main]: Returning override for track 4592 Debug: [Main]: Returning override for track 4592 Debug: [Main]: Returning override for track 4592 Debug: [Main]: Returning override for track 4592 Debug: [Main]: Returning override for track 4592 Debug: [Main]: Returning override for track 4592 Debug: [Main]: Returning override for track 4592 Debug: [Main]: Returning override for track 4592 Debug: [Main]: Returning override for track 4592