Xorg freeze

Regardless of the login manager (lightdm, gdm, kdm) using Kerberos (5) for authentication with LDAP and NFS (autofs5) fails and seems to traceback to DBus in one way or another (but this is the first crash report that has been produced despite our logs intimating the connection to DBus).

Each time anyone on our system tries to login, auth.log shows the attempt as successful but after the login manager tries to transfer control to the desktop environment (or window manager), nothing happens. Unity, Gnome, KDE, wmii, WindowMaker, AfterStep, Blackbox all fail to load.

At times we will stop the login manager service (e.g., service gdm stop) and later in the logs a DBus segfault will appear depending on which login manager we tried.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xorg 1:7.6+12ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-26.41-generic 3.2.19
Uname: Linux 3.2.0-26-generic x86_64
ApportVersion: 2.0.1-0ubuntu11
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
Date: Mon Jul 23 10:01:27 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, even including gdb or git bisection work if needed
GraphicsCard:
 NVIDIA Corporation G96 [Quadro FX 380] [10de:0658] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: NVIDIA Corporation Device [10de:063b]
Lsusb:
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
 Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
 Bus 002 Device 003: ID 03f0:0024 Hewlett-Packard KU-0316 Keyboard
MachineType: Hewlett-Packard HP Z210 Workstation
ProcEnviron:
 SHELL=/bin/bash
 TERM=linux
 LANG=en_US.UTF-8
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-26-generic root=UUID=4e6a51f2-6836-474a-affa-561efecd26d6 ro splash quiet vt.handoff=7
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/03/2012
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: J51 v01.36
dmi.board.asset.tag: 2UA2060GBR
dmi.board.name: 1587h
dmi.board.vendor: Hewlett-Packard
dmi.chassis.asset.tag: 2UA2060GBR
dmi.chassis.type: 6
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvrJ51v01.36:bd04/03/2012:svnHewlett-Packard:pnHPZ210Workstation:pvr:rvnHewlett-Packard:rn1587h:rvr:cvnHewlett-Packard:ct6:cvr:
dmi.product.name: HP Z210 Workstation
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.7.8-0ubuntu1.2
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu3.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu3.1
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu10.6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1.2
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