Dropping to the login screen is actually X/Xorg crashing. Not Unity. But regardless...
Thank you for taking the time to report this bug and helping to make Ubuntu better. However, your crash report is either missing or challenging to deal with as a ".crash" file. Please follow these instructions to have apport report a new bug about your crash that can be dealt with by the automatic retracer. If you are running the Ubuntu Stable Release you might need to enable apport in /etc/default/apport and restart. Now open your file manager, navigate to your /var/crash directory and open the crash report you wish to submit. If this fails you will have to open a terminal and file your report with 'ubuntu-bug /var/crash/_my_crash_report.crash' where _my_crash_report.crash is the crash you would like to report. If you get an error that you aren't allowed to access this report you will have to file it with 'sudo ubuntu-bug /var/crash/_my_crash_report.crash'. I'm closing this bug report since the process outlined above will automatically open a new bug report which can then dealt with more efficiently. Thanks in advance for your cooperation and understanding. ** Changed in: unity (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to unity in Ubuntu. Matching subscriptions: dp-unity https://bugs.launchpad.net/bugs/1070745 Title: unity crashes when installing application through Software Center Status in “unity” package in Ubuntu: Invalid Bug description: When installing a previously purchased software product the desktop freezes and evently unity crashes or the desktop drops to the login screen ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: unity 6.8.0-0ubuntu2 ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5 Uname: Linux 3.5.0-17-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.6.1-0ubuntu3 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' Date: Wed Oct 24 19:49:37 2012 InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) ProcEnviron: LANGUAGE=en_AU:en PATH=(custom, no user) LANG=en_AU.UTF-8 SHELL=/bin/bash SourcePackage: unity UpgradeStatus: Upgraded to quantal on 2012-10-19 (4 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1070745/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp