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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - pulseaudio core dumped when switch to profile output:iec958-ac3-surround-51 (alsa a52 plugin)"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=93637#c5">Comment # 5</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - pulseaudio core dumped when switch to profile output:iec958-ac3-surround-51 (alsa a52 plugin)"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=93637">bug 93637</a>
              from <span class="vcard"><a class="email" href="mailto:tom.ty89@gmail.com" title="Tom Yan <tom.ty89@gmail.com>"> <span class="fn">Tom Yan</span></a>
</span></b>
        <pre>Created <span class=""><a href="attachment.cgi?id=120885" name="attach_120885" title="full journalctl -b after core dumped">attachment 120885</a> <a href="attachment.cgi?id=120885&action=edit" title="full journalctl -b after core dumped">[details]</a></span>
full journalctl -b after core dumped

Jan 08 07:04:28 localhost rtkit-daemon[426]: Successfully made thread 425 of
process 425 (/usr/bin/pulseaudio) owned by '1000' high priority at nice level
-11.
Jan 08 07:04:28 localhost rtkit-daemon[426]: Supervising 1 threads of 1
processes of 1 users.
Jan 08 07:04:28 localhost rtkit-daemon[426]: Supervising 1 threads of 1
processes of 1 users.
Jan 08 07:04:28 localhost rtkit-daemon[426]: Successfully made thread 436 of
process 425 (/usr/bin/pulseaudio) owned by '1000' RT at priority 5.
Jan 08 07:04:28 localhost rtkit-daemon[426]: Supervising 2 threads of 1
processes of 1 users.
Jan 08 07:04:28 localhost rtkit-daemon[426]: Supervising 2 threads of 1
processes of 1 users.
Jan 08 07:04:28 localhost rtkit-daemon[426]: Successfully made thread 437 of
process 425 (/usr/bin/pulseaudio) owned by '1000' RT at priority 5.
Jan 08 07:04:28 localhost rtkit-daemon[426]: Supervising 3 threads of 1
processes of 1 users.
Jan 08 07:05:46 localhost rtkit-daemon[426]: Supervising 2 threads of 1
processes of 1 users.
Jan 08 07:05:46 localhost rtkit-daemon[426]: Successfully made thread 452 of
process 425 (/usr/bin/pulseaudio) owned by '1000' RT at priority 5.
Jan 08 07:05:46 localhost rtkit-daemon[426]: Supervising 3 threads of 1
processes of 1 users.
Jan 08 07:05:46 localhost systemd-coredump[453]: Process 425 (pulseaudio) of
user 1000 dumped core.

                                                 Stack trace of thread 452:
                                                 #0  0x00007f61962945f8 raise
(libc.so.6)
                                                 #1  0x00007f6196295a7a abort
(libc.so.6)
                                                 #2  0x00007f6189366a4b n/a
(libalsa-util.so)
                                                 #3  0x00007f61970d95f8 n/a
(libpulsecommon-7.1.so)
                                                 #4  0x00007f61968104a4
start_thread (libpthread.so.0)
                                                 #5  0x00007f619634a13d __clone
(libc.so.6)

                                                 Stack trace of thread 425:
                                                 #0  0x00007f6196341251 ppoll
(libc.so.6)
                                                 #1  0x00007f619732a61d
pa_mainloop_poll (libpulse.so.0)
                                                 #2  0x00007f619732ac0e
pa_mainloop_iterate (libpulse.so.0)
                                                 #3  0x00007f619732acc0
pa_mainloop_run (libpulse.so.0)
                                                 #4  0x0000000000406e4a main
(pulseaudio)
                                                 #5  0x00007f6196281610
__libc_start_main (libc.so.6)
                                                 #6  0x00000000004077f9 _start
(pulseaudio)

                                                 Stack trace of thread 437:
                                                 #0  0x00007f6196341251 ppoll
(libc.so.6)
                                                 #1  0x00007f619758d437
pa_rtpoll_run (libpulsecore-7.1.so)
                                                 #2  0x00007f618936cfba n/a
(libalsa-util.so)
                                                 #3  0x00007f61970d95f8 n/a
(libpulsecommon-7.1.so)
                                                 #4  0x00007f61968104a4
start_thread (libpthread.so.0)
                                                 #5  0x00007f619634a13d __clone
(libc.so.6)

[tom@localhost ~]$ grep microcode journal 
Jan 08 07:03:35 localhost kernel: microcode: CPU0 microcode updated early to
revision 0x1c, date = 2014-07-03
Jan 08 07:03:36 localhost kernel: microcode: CPU1 microcode updated early to
revision 0x1c, date = 2014-07-03
Jan 08 07:03:36 localhost kernel: microcode: CPU2 microcode updated early to
revision 0x1c, date = 2014-07-03
Jan 08 07:03:36 localhost kernel: microcode: CPU3 microcode updated early to
revision 0x1c, date = 2014-07-03
Jan 08 07:03:36 localhost kernel: microcode: CPU0 sig=0x306c3, pf=0x2,
revision=0x1c
Jan 08 07:03:36 localhost kernel: microcode: CPU1 sig=0x306c3, pf=0x2,
revision=0x1c
Jan 08 07:03:36 localhost kernel: microcode: CPU2 sig=0x306c3, pf=0x2,
revision=0x1c
Jan 08 07:03:36 localhost kernel: microcode: CPU3 sig=0x306c3, pf=0x2,
revision=0x1c
Jan 08 07:03:36 localhost kernel: microcode: Microcode Update Driver: v2.00
<<a href="mailto:tigran@aivazian.fsnet.co.uk">tigran@aivazian.fsnet.co.uk</a>>, Peter Oruba
[tom@localhost ~]$</pre>
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