After updates (2012-03-23) Unity3D fails to launch

[Chris Van Hoof]

After updating today I am no longer able to login to the desktop with Unity3D (2D does work). The lightdm window sometimes dissapears and I am presented the the normal desktop wallpaper and in some cases even a mouse cursor and the files that are on my desktop. No evidence of the Unity launcher or top panel at all.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xorg 1:7.6+12ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-20.32-generic 3.2.12
Uname: Linux 3.2.0-20-generic x86_64
ApportVersion: 1.95-0ubuntu1
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
Date: Fri Mar 23 21:29:21 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120120)
MachineType: LENOVO 4286CTO
ProcEnviron:
 LANGUAGE=en_US:en
 TERM=linux
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-20-generic root=UUID=5e987dbc-f073-416e-9764-1bcbce35de1e ro nodmraid elevator=noop rootflags=data=writeback usbcore.autosuspend=1 quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/02/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 8DET51WW (1.21 )
dmi.board.asset.tag: Not Available
dmi.board.name: 4286CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr8DET51WW(1.21):bd08/02/2011:svnLENOVO:pn4286CTO:pvrThinkPadX220:rvnLENOVO:rn4286CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4286CTO
dmi.product.version: ThinkPad X220
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.7.2-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2

[Launchpad Janitor (janitor)]

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

[Jorge Castro (jorge)]

Mine is segfaulting too. Launching it in the terminal didn't work at first, it said ~/.cache/unity/bgcachefile was missing.

Creating that file gets a bit farther but segfaults right away.

[Jorge Castro (jorge)]

(Not sure if this is xorg's problem or unity itself since both sets of packages were updated.)

[Robert Hooker (sarvatt)]

I asked him to sudo dpkg -i /var/cache/apt/archives/libgl1-mesa-dri_8.0.1-0ubuntu5_amd64.deb /var/cache/apt/archives/libgl1-mesa-glx_8.0.1-0ubuntu5_amd64.deb /var/cache/apt/archives/libglapi-mesa_8.0.1-0ubuntu5_amd64.deb /var/cache/apt/archives/libglu1-mesa_8.0.1-0ubuntu5_amd64.deb to downgrade his mesa and it didn't make anything better, thats the only possible X related update that could have caused this (and I didn't see evidence of the new assertion being hit in the lightdm logs) so reassigning to unity for now.

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 963465, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.