*** This bug is a duplicate of bug 1663528 ***
    https://bugs.launchpad.net/bugs/1663528

Thank you for taking the time to report this crash and helping to make
this software better.  This particular crash has already been reported
and is a duplicate of bug #1663528, so is being marked as such.  Please
look at the other bug report to see if there is any missing information
that you can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report.  Please continue to report any other bugs you may
find.

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** This bug has been marked a duplicate of bug 1663528
   pulseaudio assert failure: pulseaudio: mixer.c:929: 
snd_mixer_elem_get_callback_private: Assertion `mixer' failed.

** Information type changed from Private to Public

** Tags removed: need-amd64-retrace

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https://bugs.launchpad.net/bugs/1678911

Title:
  pulseaudio assert failure: pulseaudio: mixer.c:929:
  snd_mixer_elem_get_callback_private: Zusicherung »mixer« nicht
  erfüllt.

Status in pulseaudio package in Ubuntu:
  New

Bug description:
  After startup and login, changed from nvidia proprietary to nouveau

  ProblemType: Crash
  DistroRelease: Ubuntu 17.04
  Package: pulseaudio 1:10.0-1ubuntu2
  ProcVersionSignature: Ubuntu 4.10.0-14.16-generic 4.10.3
  Uname: Linux 4.10.0-14-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
  ApportVersion: 2.20.4-0ubuntu2
  Architecture: amd64
  AssertionMessage: pulseaudio: mixer.c:929: 
snd_mixer_elem_get_callback_private: Zusicherung »mixer« nicht erfüllt.
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  erik       3387 F.... pulseaudio
   /dev/snd/controlC0:  erik       3387 F.... pulseaudio
  CurrentDesktop: Unity:Unity7
  Date: Mon Apr  3 09:17:08 2017
  ExecutablePath: /usr/bin/pulseaudio
  ExecutableTimestamp: 1490811859
  InstallationDate: Installed on 2016-04-08 (359 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160323)
  ProcCmdline: /usr/bin/pulseaudio --start --log-target=syslog
  ProcCwd: /
  ProcEnviron:
   LANG=de_DE.UTF-8
   LANGUAGE=de_DE
   PATH=(custom, no user)
   SHELL=/bin/bash
   XDG_RUNTIME_DIR=<set>
  Signal: 6
  SourcePackage: pulseaudio
  StacktraceTop:
   __assert_fail_base (fmt=<optimized out>, 
assertion=assertion@entry=0x7fccb9037188 "mixer", 
file=file@entry=0x7fccb9037419 "mixer.c", line=line@entry=929, 
function=function@entry=0x7fccb90376a0 "snd_mixer_elem_get_callback_private") 
at assert.c:92
   __GI___assert_fail (assertion=0x7fccb9037188 "mixer", file=0x7fccb9037419 
"mixer.c", line=929, function=0x7fccb90376a0 
"snd_mixer_elem_get_callback_private") at assert.c:101
   snd_mixer_elem_get_callback_private () from 
/usr/lib/x86_64-linux-gnu/libasound.so.2
   ?? () from /usr/lib/pulse-10.0/modules/module-alsa-card.so
   ?? () from /usr/lib/pulse-10.0/modules/module-alsa-card.so
  Title: pulseaudio assert failure: pulseaudio: mixer.c:929: 
snd_mixer_elem_get_callback_private: Zusicherung »mixer« nicht erfüllt.
  UpgradeStatus: Upgraded to zesty on 2017-04-03 (0 days ago)
  UserGroups: adm cdrom debian-transmission dip lpadmin plugdev sambashare sudo
  dmi.bios.date: 08/06/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: A186P105
  dmi.board.asset.tag: N/A
  dmi.board.name: Z68ITX-B-E
  dmi.board.vendor: ZOTAC
  dmi.board.version: Rev.00
  dmi.chassis.asset.tag: N/A
  dmi.chassis.type: 3
  dmi.chassis.vendor: N/A
  dmi.chassis.version: N/A
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrA186P105:bd08/06/2013:svnMotherboardbyZOTAC:pnZ68ITX-B-E:pvrRev.00:rvnZOTAC:rnZ68ITX-B-E:rvrRev.00:cvnN/A:ct3:cvrN/A:
  dmi.product.name: Z68ITX-B-E
  dmi.product.version: Rev.00
  dmi.sys.vendor: Motherboard by ZOTAC

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