[pulseaudio-discuss] PulseAudio seems to hang in pthread_join() if the libc.so.6 is using linuxthreads-0.10

Tanu Kaskinen tanuk at iki.fi
Fri Oct 5 05:37:39 PDT 2012

On Fri, 2012-10-05 at 18:47 +0800, Croach wrote:
> Hi,
> I have do porting PulseAudio to the powerpc platform, and PulseAudio
> hangs if I use the command to start "pulseaudio --start --daemonize."
> I have use gdb to trace the process, and the main thread hangs in the
> pthread_join(), which is called in lock-autospawn.
> The libc.so.6 of this powerpc platform is consisted of the following extensions:
>   Available extensions:
>         GNU libio by Per Bothner
>         crypt add-on version 2.1 by Michael Glad and others
>         linuxthreads-0.10 by Xavier Leroy
>         spe-0.1 by Aldy Hernandez
>         BIND-8.2.3-T5B
>         libthread_db work sponsored by Alpha Processor Inc
>         NIS(YP)/NIS+ NSS modules 0.19 by Thorsten Kukuk
> Pulseaudio works fine on another powerpc platform, and the information
> of the libc.so.6 is:
>   Available extensions:
> 	crypt add-on version 2.1 by Michael Glad and others
> 	GNU Libidn by Simon Josefsson
> 	Native POSIX Threads Library by Ulrich Drepper et al
> 	Support for some architectures added on, not maintained in glibc core.
> 	BIND-8.2.3-T5B
> I have do some tests on other platforms with different version of
> libc.so.6, and PulseAudio always hangs on the platforms that libc.so
> is using linuxthreads-0.10.
> Is it the problem of the pthread lib?

At least I can't say based on the given information where the bug is.

> I think I can solve this issus by changing the libc.so.6.
> However, many of our applications are built on this libc.so, so I
> would like to know if there's any other solution?

As a workaround, maybe you can start pulseaudio without the --start


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