unity panel crashes randomly

[Phil Norbeck]

After about 45-60 minutes of using Ubuntu 16.10 x64, the unity-panel disappears. Open apps continue to function but I cannot open new apps or switch any without the panel. I get stuck so I am forced to hard boot.

/var/log/kern.log has the following over and over:

Oct 17 19:27:49 hostname unity-settings-[1833]: Unable to register client: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files
Oct 17 19:27:56 hostname unity-panel-ser[2160]: window_menu_model_new: assertion 'BAMF_IS_APPLICATION(app)' failed
Oct 17 19:27:56 hostname unity-panel-ser[2160]: track_menus: assertion 'IS_WINDOW_MENU(menus)' failed

/var/log/syslog has this over and over:

Oct 17 19:18:55 hostname zeitgeist-datah[2853]: zeitgeist-datahub.vala:212: Error during inserting events: GDBus.Error:org.gnome.zeitgeist.EngineError.InvalidArgument: Incomplete event: interpretation, manifestation and actor are required
Oct 17 19:18:55 hostname zeitgeist-datah[2853]: zeitgeist-datahub.vala:212: Error during inserting events: GDBus.Error:org.gnome.zeitgeist.EngineError.InvalidArgument: Incomplete event: interpretation, manifestation and actor are required

GDBus related?

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: unity-services 7.5.0+16.10.20160906.1-0ubuntu1
ProcVersionSignature: Ubuntu 4.8.0-22.24-generic 4.8.0
Uname: Linux 4.8.0-22-generic x86_64
.tmp.unity_support_test.0:

ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
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 Oct 17 19:51:43 2016
DistUpgraded: Fresh install
DistroCodename: yakkety
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller])
   Subsystem: Dell Core Processor Integrated Graphics Controller [1028:041b]
GsettingsChanges:
 b'org.compiz.core' b'active-plugins' b"['core', 'composite', 'opengl', 'wall', 'snap', 'resize', 'imgpng', 'mousepoll', 'move', 'copytex', 'vpswitch', 'regex', 'place', 'grid', 'commands', 'session', 'compiztoolbox', 'unitymtgrabhandles', 'animation', 'fade', 'expo', 'workarounds', 'scale', 'ezoom', 'unityshell']"
 b'com.canonical.Unity' b'integrated-menus' b'true'
 b'com.canonical.Unity' b'minimize-count' b'5'
 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 2016-10-13 (4 days ago)
InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
LightdmDisplayLog: [dix] EventToCore: Not implemented yet
MachineType: Dell Inc. Studio 1749
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-22-generic root=UUID=c43272e1-f363-481c-a991-b17db1497cef ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/24/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A08
dmi.board.asset.tag: 1234567890
dmi.board.name: 029DYC
dmi.board.vendor: Dell Inc.
dmi.chassis.asset.tag: 1234567890
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA08:bd03/24/2011:svnDellInc.:pnStudio1749:pvr:rvnDellInc.:rn029DYC:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Studio 1749
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.13.0+16.10.20160818.2-0ubuntu2
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.70-1
version.libgl1-mesa-dri: libgl1-mesa-dri 12.0.3-1ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 12.0.3-1ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-1ubuntu6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.2-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.1-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160706-1ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-2
xserver.bootTime: Mon Oct 17 19:27:29 2016
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 5022
 vendor AUO
xserver.version: 2:1.18.4-1ubuntu6

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.