*** This bug is a duplicate of bug 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

** Attachment removed: "CoreDump.gz"

** Attachment removed: "Disassembly.txt"

** Attachment removed: "ProcMaps.txt"

** Attachment removed: "ProcStatus.txt"

** Attachment removed: "Registers.txt"

** Attachment removed: "Stacktrace.txt"

** Attachment removed: "ThreadStacktrace.txt"

** 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

You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to pulseaudio in Ubuntu.

  user gets logged out from gnome-shell session after closing lid

Status in pulseaudio package in Ubuntu:

Bug description:
  1) What you expected to happen:

  When I open the lid I expect the system to resume without logging me

  2) What happened instead:

  When I close the lid of my laptop the system suspends (as intended),
  and when I open the lid the system resumes (as intended).

  However, if I don't suspend manually before closing the lid, on system
  resume it seems like I get logged out of my X session.

  ยท I have been running different versions of Ubuntu on 2 different
  systems myself:

  __ Machine _______| Version | DE ___| GPUs _______| Display | prop. driver
  1) ThinkPad E530 _- 16.04 __- Unity - Intel _________- Xorg - no
  2) ThinkPad E530 _- 16.04 __- Gnome - Intel _________- Xorg - no
  3) ThinkPad T470p - 17.10 __- Gnome - Intel + Nvidia - Xorg - no
  4) ThinkPad T470p - 18.04 __- Gnome - Intel + Nvidia - Xorg - yes

  and this is the first time (configuration #4) that the problem
  presents itself.

  ProblemType: Crash
  DistroRelease: Ubuntu 18.04
  Package: pulseaudio 1:11.1-1ubuntu7.1
  ProcVersionSignature: Ubuntu 4.15.0-30.32-generic 4.15.18
  Uname: Linux 4.15.0-30-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  AssertionMessage: pulseaudio: mixer.c:929: 
snd_mixer_elem_get_callback_private: Assertion `mixer' failed.
   /dev/snd/pcmC0D0p:   ncrfgs     3603 F...m pulseaudio
   /dev/snd/controlC0:  ncrfgs     3603 F.... pulseaudio
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Aug 11 17:10:20 2018
  ExecutablePath: /usr/bin/pulseaudio
  ExecutableTimestamp: 1526913701
  ProcCmdline: /usr/bin/pulseaudio --start --log-target=syslog
  ProcCwd: /
  Signal: 6
  SourcePackage: pulseaudio
   __assert_fail_base (fmt=0x7fc7b1c847d8 "%s%s%s:%u: %s%sAssertion `%s' 
failed.\n%n", assertion=assertion@entry=0x7fc7a3bb7148 "mixer", 
file=file@entry=0x7fc7a3bb73d9 "mixer.c", line=line@entry=929, 
function=function@entry=0x7fc7a3bb7660 "snd_mixer_elem_get_callback_private") 
at assert.c:92
   __GI___assert_fail (assertion=0x7fc7a3bb7148 "mixer", file=0x7fc7a3bb73d9 
"mixer.c", line=929, function=0x7fc7a3bb7660 
"snd_mixer_elem_get_callback_private") at assert.c:101
   snd_mixer_elem_get_callback_private () from 
   ?? () from /usr/lib/pulse-11.1/modules/module-alsa-card.so
   ?? () from /usr/lib/pulse-11.1/modules/module-alsa-card.so
  Title: pulseaudio assert failure: pulseaudio: mixer.c:929: 
snd_mixer_elem_get_callback_private: Assertion `mixer' failed.
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  dmi.bios.date: 09/28/2017
  dmi.bios.vendor: LENOVO
  dmi.bios.version: R0FET37W (1.17 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20J6CTO1WW
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0J40709 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.product.family: ThinkPad T470p
  dmi.product.name: 20J6CTO1WW
  dmi.product.version: ThinkPad T470p
  dmi.sys.vendor: LENOVO

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