Public bug reported:

I've upgraded from precise to trusty a few weeks ago and I'm not able to
use unity anymore. If I choose "Ubuntu" on lightdm, I got only my
desktop screen, with no dash nor top bar, just my desktop icons. If I
open any window, The window appears with no title bar.

To report this bug, I typed Ctrl + Alt + T, and used apport-bug, which
opened the browser. I'm not able to switch back to the terminal right
now I'm writing this description, thus alt+tab doesn't work too.

Just let me know if you need more info.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity 7.1.2+14.04.20140305-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-15.35-generic 3.13.5
Uname: Linux 3.13.0-15-generic x86_64
.tmp.unity.support.test.0:
 
ApportVersion: 2.13.2-0ubuntu5
Architecture: amd64
CompizPlugins: 
[core,bailer,detection,composite,opengl,compiztoolbox,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,workarounds,scale,expo,ezoom]
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order 
/var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission 
denied
Date: Thu Mar  6 01:50:19 2014
DistUpgraded: 2014-02-18 18:48:29,441 DEBUG enabling apt cron job
DistroCodename: trusty
DistroVariant: ubuntu
DkmsStatus:
 vboxhost, 4.3.6, 3.11.0-15-generic, x86_64: installed
 vboxhost, 4.3.6, 3.13.0-13-generic, x86_64: installed
 vboxhost, 4.3.6, 3.13.0-14-generic, x86_64: installed
 vboxhost, 4.3.6, 3.13.0-15-generic, x86_64: installed
GraphicsCard:
 Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller 
[8086:0162] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Gigabyte Technology Co., Ltd Device [1458:d000]
InstallationDate: Installed on 2013-03-19 (351 days ago)
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 
(20130213)
MachineType: Gigabyte Technology Co., Ltd. To be filled by O.E.M.
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-15-generic 
root=UUID=c51f30e3-4663-44de-a683-7a7313eeec50 ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: Upgraded to trusty on 2014-02-18 (15 days ago)
dmi.bios.date: 08/23/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F2
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: Z77N-WIFI
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrF2:bd08/23/2012:svnGigabyteTechnologyCo.,Ltd.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnZ77N-WIFI:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To be filled by O.E.M.
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
version.compiz: compiz 1:0.9.11+14.04.20140305-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.52-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0~rc3-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0~rc3-0ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.15.0-1ubuntu6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
xserver.bootTime: Thu Mar  6 01:46:37 2014
xserver.configfile: default
xserver.devices:
 input        Power Button         KEYBOARD, id 6
 input        Video Bus            KEYBOARD, id 7
 input        Power Button         KEYBOARD, id 8
 input        Logitech Unifying Device. Wireless PID:4024 KEYBOARD, id 9
xserver.errors:
 
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id                                9986 
 vendor                                     SNY
xserver.version: 2:1.15.0-1ubuntu6

** Affects: unity (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug compiz-0.9 trusty ubuntu

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https://bugs.launchpad.net/bugs/1288553

Title:
  No dash nor window title bars on unity after upgrate from precise to
  trusty

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