Try reproducing the bug again cleanly, and jot down the exact steps taken. Then file the bug (while the system is crashed) using ubuntu- bug, and collect a full backtrace - see http://wiki.ubuntu.com/X/Backtrace for a step by step guide.
** Changed in: xserver-xorg-video-nouveau (Ubuntu) Status: Incomplete => Invalid ** Changed in: nvidia-graphics-drivers (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to nvidia-graphics-drivers in Ubuntu. https://bugs.launchpad.net/bugs/1034815 Title: Week 32: Nvidia system crash during normal operation Status in “nvidia-graphics-drivers” package in Ubuntu: Invalid Status in “xserver-xorg-video-nouveau” package in Ubuntu: Invalid Bug description: Week 32: Ubuntu 12.10 Quantal (Nvidia) with ppa:unity-team/staging System crashed and was not responding to any keys. Had to restart which helped system to recover back to normal state. See Screenshots attached - After crash, the display was switching between 2 kinds - scrambled desktop view and command view showing "Fontconfig warning" ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: unity 6.0.0+bzr2538ubuntu0+746 [origin: LP-PPA-unity-team-staging] ProcVersionSignature: Ubuntu 3.5.0-8.8-generic 3.5.0 Uname: Linux 3.5.0-8-generic i686 NonfreeKernelModules: nvidia ApportVersion: 2.4-0ubuntu6 Architecture: i386 CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell] CrashDB: unity Date: Thu Aug 9 10:49:22 2012 InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha i386 (20120713.1) ProcEnviron: LANGUAGE=en_GB:en TERM=xterm PATH=(custom, no user) LANG=en_GB.UTF-8 SHELL=/bin/bash SourcePackage: unity UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers/+bug/1034815/+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