Public bug reported:

Ubuntu 18.04 LTS
gnome-settings-daemon 3.28.1-0ubuntu1

Summary:
--------

When I press any of my keyboard's volume up/down/mute keys, my keyboard
and mouse lock up completely. (Mouse pointer frozen and no keypresses
have any effect). The rest of the system continues to function normally.
The on-screen volume notification appears repeatedly every few seconds.

Variations:
-----------

Occasionally, I can press the buttons a few times with no effect, before
the lock-up eventually happens.

Also occasionally, my Gnome session may crash completely to a black
screen a few seconds after the input devices lock up.

I haven't been able to discern a pattern to when these different effects
occur.

Troubleshooting attempted:
--------------------------

I can reproduce this when running from a Live USB on the same system.

Disabling the keyboard shortcuts for volume up/down and mute in the
keyboard settings GUI does not prevent this issue.

If I set different keys for these shortcuts, they work fine - the
problem is specific to my keyboard's special media keys.

The other (non-audio-related) media keys on my keyboard work fine.

I have gone through the suggested "Useful Information" steps at
https://wiki.ubuntu.com/Hotkeys/Troubleshooting and will attach the
output files to this report.


ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-settings-daemon 3.28.1-0ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri May 11 12:30:24 2018
EcryptfsInUse: Yes
InstallationDate: Installed on 2017-12-14 (147 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 SHELL=/bin/zsh
SourcePackage: gnome-settings-daemon
UpgradeStatus: Upgraded to bionic on 2018-04-27 (13 days ago)

** Affects: gnome-settings-daemon (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic

** Attachment added: "dmesg.log"
   https://bugs.launchpad.net/bugs/1770629/+attachment/5137747/+files/dmesg.log

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https://bugs.launchpad.net/bugs/1770629

Title:
  Keyboard and mouse lockup when using media keys to adjust volume

Status in gnome-settings-daemon package in Ubuntu:
  New

Bug description:
  Ubuntu 18.04 LTS
  gnome-settings-daemon 3.28.1-0ubuntu1

  Summary:
  --------

  When I press any of my keyboard's volume up/down/mute keys, my
  keyboard and mouse lock up completely. (Mouse pointer frozen and no
  keypresses have any effect). The rest of the system continues to
  function normally. The on-screen volume notification appears
  repeatedly every few seconds.

  Variations:
  -----------

  Occasionally, I can press the buttons a few times with no effect,
  before the lock-up eventually happens.

  Also occasionally, my Gnome session may crash completely to a black
  screen a few seconds after the input devices lock up.

  I haven't been able to discern a pattern to when these different
  effects occur.

  Troubleshooting attempted:
  --------------------------

  I can reproduce this when running from a Live USB on the same system.

  Disabling the keyboard shortcuts for volume up/down and mute in the
  keyboard settings GUI does not prevent this issue.

  If I set different keys for these shortcuts, they work fine - the
  problem is specific to my keyboard's special media keys.

  The other (non-audio-related) media keys on my keyboard work fine.

  I have gone through the suggested "Useful Information" steps at
  https://wiki.ubuntu.com/Hotkeys/Troubleshooting and will attach the
  output files to this report.

  
  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: gnome-settings-daemon 3.28.1-0ubuntu1
  ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
  Uname: Linux 4.15.0-20-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu7
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Fri May 11 12:30:24 2018
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2017-12-14 (147 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
  ProcEnviron:
   LANGUAGE=en_GB:en
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_GB.UTF-8
   SHELL=/bin/zsh
  SourcePackage: gnome-settings-daemon
  UpgradeStatus: Upgraded to bionic on 2018-04-27 (13 days ago)

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