Playing songs suddenly hangs, cannot restart it without restarting software

Bug #1261208 reported by Cysioland on 2013-12-15
This bug affects 2 people
Affects Status Importance Assigned to Milestone
mixxx (Fedora)

Bug Description

Description of problem:
When you play songs with Mixxx and stream to Icecast 2, it plays for a while,
and then hangs. Decks stop spinning, cannot play anything, must restart Mixxx
to return.

Version-Release number of selected component (if applicable):

How reproducible:
I don't know, maybe it's only my machine issue.

Steps to Reproduce:
1. Connect to Icecast 2 server.
2. Play some music, fiddle with controls, load up samplers, etc.
3. Wait few seconds – few minutes.
4. Order the music list by Title or other.
5. BUG!

Actual results:
Playing songs hang. Decks stop spinning, cannot play anything, must restart
Mixxx to return.

Expected results:
Songs are playing flawlessy, without hangs.

Additional info:
Installed on Fedora 19 via RPMFusion, guys from its Bugzilla asked me to report this also here, original bug:

Owen Williams (ywwg) wrote :

What audio hardware are you using? Also, can you attach the contents of a log from a run where it hung? The log is in ~/.mixxx/mixxx.log

Cysioland (cysioland) wrote :

I'm using Sweex 7.1 USB sound card via Pulseaudio. This appeared in console when it crashed:

ALSA lib pcm.c:7843:(snd_pcm_recover) underrun occurred
Expression 'err' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 3315
Expression 'ContinuePoll( self, StreamDirection_In, &pollTimeout, &pollCapture
)' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 3847
Expression 'PaAlsaStream_WaitForFrames( stream, &framesAvail, &xrun )' failed
in 'src/hostapi/alsa/pa_linux_alsa.c', line: 4219

Owen Williams (ywwg) wrote :

That's helpful, but we also really need the mixxx.log

Changed in mixxx (Fedora):
importance: Unknown → Medium
status: Unknown → Confirmed
RJ Skerry-Ryan (rryan) wrote :

My suspicion is that we deadlocked our master thread on the sidechain thread by locking the double-buffer for communicating with the sidechain. That matches all the observations (ALSA throwing a hissy fit, all decks stopping, use of icecast, etc.)

RJ Skerry-Ryan (rryan) wrote :

(And if that is true then this is fixed since the sidechain is no longer a double-buffered mutex approach due to Bug #1179027 )

RJ Skerry-Ryan (rryan) wrote :

Cysioland -- I think the mystery might be solved if you could follow the instructions here to get a backtrace:


Changed in mixxx:
status: New → Incomplete
importance: Undecided → Critical
RJ Skerry-Ryan (rryan) wrote :

Critical importance, marked incomplete since we are waiting on info from Cysioland.

Changed in mixxx:
milestone: none → 1.12.0
RJ Skerry-Ryan (rryan) on 2014-03-24
tags: added: crash shoutcast
Daniel Schürmann (daschuer) wrote :

Maybe I see the same issue here:

Maybe this is the same issue like this:

Changed in mixxx (Fedora):
status: Confirmed → Expired
Richard (ricktonycr) on 2017-12-03
description: updated
Changed in mixxx:
status: Incomplete → Confirmed
Daniel Schürmann (daschuer) wrote :

@ricktonycr: Which version of Mixxx did you use? We have recently made some changes in broadcast engine. Does the problem still exist in the latest 2.1 alpha:

RJ Skerry-Ryan (rryan) on 2018-09-21
tags: added: broadcast
removed: shoutcast
Changed in mixxx:
status: Confirmed → Incomplete
milestone: 2.0.0 → none
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