Looks like it isn't finding the kernel nvidia driver.  Guess when you
upgraded it updated the kernel but for whatever reason didn't rebuild
the nvidia driver.   Probably if you go into grub and boot an earlier
kernel it'd work.

Try `sudo apt-get purge nvidia-*` and then reinstalling nvidia-current
via jockey.  That should force it to rebuild against the current kernel.

It would be interesting to see a make.log or something to see why the
kernel module didn't get built.  Have you manually installed kernels
during this timeframe?

** Description changed:

  Upgraded to 12.04 beta about a week ago, display worked fine. Performed
  an apt-get upgrade yesterday and now the nVidia driver won't load
  anymore (both available versions in Jockey). Xorg tries to determine the
  monitor on startup but fails (see attached screenshot).
  
  Machine is Asus M50Vm laptop with nVidia GeForce 9600m GS with 1GB ram.
+ 
+ 
+ [    40.850] (II) LoadModule: "nvidia"
+ [    40.850] (II) Loading 
/usr/lib/x86_64-linux-gnu/xorg/extra-modules/nvidia_drv.so
+ [    41.198] (II) Module nvidia: vendor="NVIDIA Corporation"
+ [    41.242]  compiled for 4.0.2, module version = 1.0.0
+ [    41.242]  Module class: X.Org Video Driver
+ [    41.401] (EE) NVIDIA: Failed to load the NVIDIA kernel module. Please 
check your
+ [    41.401] (EE) NVIDIA:     system's kernel log for additional error 
messages.
+ [    41.401] (II) UnloadModule: "nvidia"
+ [    41.401] (II) Unloading nvidia
+ [    41.401] (EE) Failed to load module "nvidia" (module-specific error, 0)
  
  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: xorg 1:7.6+10ubuntu1
  ProcVersionSignature: Ubuntu 3.2.0-18.28-generic 3.2.9
  Uname: Linux 3.2.0-18-generic x86_64
  ApportVersion: 1.94.1-0ubuntu1
  Architecture: amd64
  CompizPlugins: 
[core,bailer,detection,composite,opengl,compiztoolbox,decor,place,move,imgpng,session,mousepoll,snap,grid,unitymtgrabhandles,regex,vpswitch,gnomecompat,resize,wall,animation,workarounds,fade,expo,scale,ezoom,unityshell]
  CompositorRunning: None
  Date: Wed Mar  7 20:37:27 2012
  DistUpgraded: Log time: 2012-03-04 11:48:09.339228
  DistroCodename: precise
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, if not too technical
  GraphicsCard:
-  NVIDIA Corporation G96 [GeForce 9600M GS] [10de:0648] (rev a1) (prog-if 00 
[VGA controller])
-    Subsystem: ASUSTeK Computer Inc. Device [1043:1892]
+  NVIDIA Corporation G96 [GeForce 9600M GS] [10de:0648] (rev a1) (prog-if 00 
[VGA controller])
+    Subsystem: ASUSTeK Computer Inc. Device [1043:1892]
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  MachineType: ASUSTeK Computer Inc. M50Vm
  ProcEnviron:
-  LANG=nl_NL.utf8
-  SHELL=/bin/bash
+  LANG=nl_NL.utf8
+  SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-18-generic 
root=UUID=0412ec01-0252-40ab-ac6e-75161a189e88 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  UnitySupportTest:
-  Error: command ['/usr/lib/nux/unity_support_test', '-p', '-f'] failed with 
exit code 5: Xlib:  extension "GLX" missing on display ":0".
-  Error: GLX is not available on the system
+  Error: command ['/usr/lib/nux/unity_support_test', '-p', '-f'] failed with 
exit code 5: Xlib:  extension "GLX" missing on display ":0".
+  Error: GLX is not available on the system
  UpgradeStatus: Upgraded to precise on 2012-03-04 (3 days ago)
  XorgConf:
-  Section "Device"
-       Identifier      "Default Device"
-       Option  "NoLogo"        "True"
-  EndSection
+  Section "Device"
+   Identifier  "Default Device"
+   Option      "NoLogo"        "True"
+  EndSection
  dmi.bios.date: 07/24/2008
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 206
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: M50Vm
  dmi.board.vendor: ASUSTeK Computer Inc.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: ATN12345678901234567
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK Computer Inc.
  dmi.chassis.version: 1.0
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr206:bd07/24/2008:svnASUSTeKComputerInc.:pnM50Vm:pvr1.0:rvnASUSTeKComputerInc.:rnM50Vm:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
  dmi.product.name: M50Vm
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK Computer Inc.
  version.compiz: compiz 1:0.9.7.0~bzr2995-0ubuntu5
  version.ia32-libs: ia32-libs 20090808ubuntu33
  version.libdrm2: libdrm2 2.4.30-1ubuntu1
  version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.1-0ubuntu2
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.1-0ubuntu2
  version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu4
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 
1:2.6.99.901+git20120126-0ubuntu2
  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

** Changed in: nvidia-graphics-drivers (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/949330

Title:
  nVidia driver won't load anymore

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