shutdown procedure should check virtualbox

[Humphrey van Polanen Petel]

After <Alt-F10> a menu appears and after choosing "shut down" a large box appears in the middle of the screen allowing me to "shutdown" or "restart".
When I choose either when VirtualBox is still running the icon in the launch bar wiggles or a panel from VirtualBox appears asking what I want to do, but I will not get the opportunity to do anything, because the shutdown procedure does not wait.

Data might get lost that way.

I suggest that the system issues an appropriate warning after choosing "shut down" from the menu like "blabla is still running, do you wish to proceed? <shut down> <wait> <cancel>" *before* going into the shutdown procedure.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: compiz-core 1:0.9.11.3+14.04.20160425-0ubuntu1
ProcVersionSignature: Ubuntu 3.16.0-77.99~14.04.1-generic 3.16.7-ckt27
Uname: Linux 3.16.0-77-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.14.1-0ubuntu3.21
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: Tue Aug 2 12:38:46 2016
DistUpgraded: Fresh install
DistroCodename: trusty
DistroVariant: ubuntu
DpkgLog:

ExecutablePath: /usr/bin/compiz
GraphicsCard:
 NVIDIA Corporation GF108 [GeForce GT 620] [10de:0f01] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Gigabyte Technology Co., Ltd Device [1458:3547]
InstallationDate: Installed on 2015-09-08 (329 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
MachineType: Dell Inc. Vostro 420 Series
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-77-generic root=UUID=f6dd8441-8143-457c-8aa4-2ad01dfbb654 ro nosplash
SourcePackage: compiz
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/17/2009
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.1.4
dmi.board.name: 0N185P
dmi.board.vendor: Dell Inc.
dmi.board.version: A02
dmi.chassis.type: 3
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.1.4:bd04/17/2009:svnDellInc.:pnVostro420Series:pvr:rvnDellInc.:rn0N185P:rvrA02:cvnDellInc.:ct3:cvr:
dmi.product.name: Vostro 420 Series
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.11.3+14.04.20160425-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.64-1~ubuntu14.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri N/A
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core N/A
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
xserver.bootTime: Tue Aug 2 12:28:43 2016
xserver.configfile: default
xserver.devices:
 input Power Button KEYBOARD, id 6
 input Power Button KEYBOARD, id 7
 input CHICONY HP Basic USB Keyboard KEYBOARD, id 8
 input ImPS/2 Generic Wheel Mouse MOUSE, id 9
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: 2:1.16.0-1ubuntu1.2~trusty2
xserver.video_driver: nouveau

[Launchpad Janitor (janitor)]

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