Public bug reported:

To reproduce play any music file with mpv like this:

mpv --ao=sdl myfile.mp3

There is no sound and the time ticker does not advance. If you press q,
mpv hangs trying to exit. If you hit ctrl-c in a debugger, the backtrace
looks like this:

Thread 1 "mpv" received signal SIGINT, Interrupt.
0x00007ffff5bc6b7d in __pthread_join (threadid=140736558647040, 
thread_return=0x0) at pthread_join.c:90
90      pthread_join.c: No such file or directory.
(gdb) bt
#0  0x00007ffff5bc6b7d in __pthread_join (threadid=140736558647040, 
thread_return=0x0) at pthread_join.c:90
#1  0x00007ffff1024936 in ?? () from /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
#2  0x00007ffff0fddff0 in ?? () from /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
#3  0x00007ffff0fdeba4 in ?? () from /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
#4  0x00007ffff0fdb833 in ?? () from /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
#5  0x00005555555a7a9f in ?? ()
#6  0x000055555559f390 in ?? ()
#7  0x00005555555e351c in ?? ()
#8  0x00005555555fb5b9 in ?? ()
#9  0x00005555555fbf7d in ?? ()
#10 0x00007fffef0a01c1 in __libc_start_main (main=0x5555555917b0, argc=3, 
argv=0x7fffffffe148, init=<optimized out>, fini=<optimized out>, 
rtld_fini=<optimized out>, stack_end=0x7fffffffe138)
    at ../csu/libc-start.c:308
#11 0x00005555555917ea in ?? ()

Using any other audio backend works.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: libsdl2-2.0-0 2.0.6+dfsg1-3ubuntu1
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.1
Architecture: amd64
CurrentDesktop: KDE
Date: Thu Oct 26 22:53:16 2017
InstallationDate: Installed on 2017-10-14 (12 days ago)
InstallationMedia: Kubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
SourcePackage: libsdl2
UpgradeStatus: Upgraded to artful on 2017-10-25 (1 days ago)

** Affects: libsdl2 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug artful

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https://bugs.launchpad.net/bugs/1727849

Title:
  SDL audio does not work in artful

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