Launched apps hang

[peterzay]

When clicking on apps in the launcher, you get a rotating circular mouse pointer (busy) and nothing happens.

This behaviour is not reproducible but appears to occur after a long day of uptime and is very intermittent. You can go days or even weeks without this problem occurring.

On my most recent event (last night), I also had very slow network response on the affected machine while other client machines on the same network were ok.

The only solution is to reboot.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: unity 7.4.0+16.04.20160906-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-92.115-generic 4.4.76
Uname: Linux 4.4.0-92-generic x86_64
.tmp.unity_support_test.0:

ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
BootLog: /dev/sda1: clean, 447678/121585664 files, 23150130/486313984 blocks
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Mon Aug 21 07:46:40 2017
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 5.0.40, 4.4.0-83-generic, x86_64: installed
 virtualbox, 5.0.40, 4.4.0-87-generic, x86_64: installed
 virtualbox, 5.0.40, 4.4.0-89-generic, x86_64: installed
 virtualbox, 5.0.40, 4.4.0-91-generic, x86_64: installed
 virtualbox, 5.0.40, 4.4.0-92-generic, x86_64: installed
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 Subsystem: Dell Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller [1028:0581]
 NVIDIA Corporation GF119 [GeForce GT 620 OEM] [10de:1049] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: NVIDIA Corporation GF119 [GeForce GT 620 OEM] [10de:0977]
GsettingsChanges:
 b'org.compiz.core' b'active-plugins' b"['core', 'composite', 'opengl', 'place', 'commands', 'imgpng', 'regex', 'vpswitch', 'mousepoll', 'compiztoolbox', 'animation', 'resize', 'expo', 'workarounds', 'session', 'grid', 'ezoom', 'wall', 'move', 'copytex', 'snap', 'unitymtgrabhandles', 'fade', 'scale', 'unityshell']"
 b'org.compiz.core' b'active-plugins' b"['core', 'composite', 'opengl', 'place', 'commands', 'imgpng', 'regex', 'vpswitch', 'mousepoll', 'compiztoolbox', 'animation', 'resize', 'expo', 'workarounds', 'session', 'grid', 'ezoom', 'wall', 'move', 'copytex', 'snap', 'unitymtgrabhandles', 'fade', 'scale', 'unityshell']"
 b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'"
 b'org.gnome.desktop.interface' b'scaling-factor' b'uint32 1'
InstallationDate: Installed on 2017-07-22 (30 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
MachineType: Dell Inc. Inspiron 660
ProcEnviron:
 PATH=(custom, no user)
 SHELL=/bin/bash
 LANG=en_US.UTF-8
 LANGUAGE=en_US
 XDG_RUNTIME_DIR=<set>
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-92-generic root=UUID=514338ab-67ad-47fe-b677-f9da6fbb478f ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/14/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A11
dmi.board.name: 0XR1GT
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 3
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA11:bd10/14/2013:svnDellInc.:pnInspiron660:pvr:rvnDellInc.:rn0XR1GT:rvrA00:cvnDellInc.:ct3:cvr:
dmi.product.name: Inspiron 660
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.12.2+16.04.20160823-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.76-1~ubuntu16.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 17.0.7-0ubuntu0.16.04.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 17.0.7-0ubuntu0.16.04.1
version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-0ubuntu0.3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1.2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2
xserver.bootTime: Mon Aug 21 07:45:51 2017
xserver.configfile: default
xserver.errors:
 Failed to load module "nvidia" (module does not exist, 0)
 Failed to load module "nvidia" (module does not exist, 0)
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.18.4-0ubuntu0.3
xserver.video_driver: nouveau

[peterzay (peterzay)]

This problem occurs on ALL versions of Ubuntu 16.04.x