Unity stopped working after the removal of Bubmlebee

[zubozrout]

Unity stopped working after I removed Bumblebee package (being astonished by the recent Nvidia initial Optimus support).
So, I followed uninstallation instructions on Ubuntu Wiki: https://wiki.ubuntu.com/Bumblebee
There is nothing wrong with that, but it seems uninstalling Bumblebee affected Unity desktop, although 3D rendering was not affected. Also, even though I had Bumblebee installed, it had nothing to do with Unity - Unity always used Intel GPU - besides I didn't even use Bubmlebee.

The problem appeared just after I rebooted. LightDM launched, I entered the password and waited ... (nothing happened). So, I was trying to find out what is going on. As I already mentioned, 3D rendering worked well. Eventually, I tried to log in as a host, which worked as it should with Unity, so I determined it may be some mess in the configuration.

After I removed all unity config files in my home (I am not sure which file did the trick), Unity started working again.

One interesting thing I noticed when trying Gnome Classic (not fallback): there was no shadow around windows, but when I logged into Unity with my account (still in that messy state), there was a shadow - and Compiz was running. Metacity also worked and so did nautilus (desktop). Therefore I suppose the problem was Unity specific, because it was the only thing that didn't work.
When I tried to execute Unity from that "clear-compiz" session, it killed metacity and still didn't work (as to error messages, unfortunately I can't remember what were they about).

My configuration: Ubuntu 13.04 (upgraded from 12.10 about 2 months ago)
Asus Zenbook UX32VD (Intel® Core™ i7-3517U CPU @ 1.90GHz × 4; 9675344 KiB RAM)

ProblemType: Crash
DistroRelease: Ubuntu 13.04
Package: compiz-core 1:0.9.9~daily13.04.05-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-17.27-generic 3.8.6
Uname: Linux 3.8.0-17-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.9.2-0ubuntu5
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
CrashCounter: 1
Date: Wed Apr 10 15:15:15 2013
DistUpgraded: 2013-02-19 23:50:01,106 DEBUG enabling apt cron job
DistroCodename: raring
DistroVariant: ubuntu
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Device [1043:1507]
   Subsystem: ASUSTeK Computer Inc. Device [1043:1507]
InstallationDate: Installed on 2012-11-24 (136 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MachineType: ASUSTeK COMPUTER INC. UX32VD
MarkForUpload: True
ProcCmdline: compiz
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=cs_CZ.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.8.0-17-generic root=UUID=5ddb346e-6284-4505-bdc6-0817b0d3a873 ro quiet splash vt.handoff=7
Signal: 6
SourcePackage: compiz
StacktraceTop:
 __gnu_cxx::__verbose_terminate_handler() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
 ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
 std::terminate() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
 __cxa_pure_virtual () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
 CcpScreen::initPluginForScreen(CompPlugin*) () from /usr/lib/compiz/libccp.so
Title: compiz crashed with SIGABRT in __gnu_cxx::__verbose_terminate_handler()
UpgradeStatus: Upgraded to raring on 2013-02-19 (49 days ago)
UserGroups: adm cdrom dip fuse lpadmin netdev plugdev sambashare sudo
dmi.bios.date: 06/06/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: UX32VD.206
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UX32VD
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX32VD.206:bd06/06/2012:svnASUSTeKCOMPUTERINC.:pnUX32VD:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX32VD:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.name: UX32VD
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
version.compiz: compiz 1:0.9.9~daily13.04.05-0ubuntu1
version.ia32-libs: ia32-libs 20090808ubuntu36
version.libdrm2: libdrm2 2.4.43-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0.3-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0.3-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.13.3-0ubuntu5
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2b2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.5-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.7-0ubuntu1
xserver.bootTime: Wed Apr 10 15:13:05 2013
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.13.3-0ubuntu5
xserver.video_driver: intel

[Will Cooke (willcooke)]

As part of the big bug clear up for 16.04 LTS I am marking this bug as Wont Fix.
These types of crasher are better handled by errors.ubutnu.com which can collate similar crash reports to help us identify persitent bugs rather than one-off crashes.
Sorry we are not able to help with this specific issue. If you are still experiencing this crash, please re-open the bug and add the tag "desktop-bugscrub-reopened". See https://wiki.ubuntu.com/BigDesktopBugScrub for more information.