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["D. Charles Pyle" <dcharlespyle@xxxxxxx>]

Has been happening and still happens since the first install of 12.04.
I am now at 14.04.3 and the bug still is there.  The difference is that
I see millions of little cubes, which then jump into big ones that show
my previous session from Windows or Fedora, depending on what I was
using just prior to Ubuntu!  Any way to introduce code into lightDM that
flushes the buffers in ATi/AMD cards so that previous contents don't
show up? I don't have this problem with GDM.

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https://bugs.launchpad.net/bugs/931967

Title:
  Corrupted graphics after the login  until the unity launcher appears

Status in OEM Priority Project:
  Fix Released
Status in OEM Priority Project oneiric series:
  Fix Released
Status in OEM Priority Project precise series:
  Fix Released
Status in Unity Greeter:
  Fix Released
Status in unity-greeter package in Ubuntu:
  Fix Released
Status in unity-greeter source package in Precise:
  Fix Released
Status in unity-greeter source package in Quantal:
  Fix Released

Bug description:
  [Impact]
  After login, it's very possible the screen will appear corrupted and show artifacts of a previous session.  This is a security and privacy concern.

  [Test Case]
  Simple as logging in several times.  It's highly reproducable (over 50% in my tests).

  [Regression Potential]
  Seems low.  We had this same patch in 12.04, but it got accidentally dropped for 12.10.

  [Original Report]
  With the latest updates im getting corrupted graphics - images after the login  until the unity launcher  - desktop appears  and this is happening in every system restart - relogin.

  Im attaching a screenshot of what im getting , it looks like its a
  combination  of corrupted images from the windows that was running
  while i was doing the latest updates , my  last session before the
  problem.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: xorg 1:7.6+10ubuntu1
  ProcVersionSignature: Ubuntu 3.2.0-15.24-generic 3.2.5
  Uname: Linux 3.2.0-15-generic x86_64
  NonfreeKernelModules: nvidia
  .proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0'
  .proc.driver.nvidia.registry: Binary: ""
  .proc.driver.nvidia.version:
   NVRM version: NVIDIA UNIX x86_64 Kernel Module  290.10  Wed Nov 16 17:39:29 PST 2011
   GCC version:  gcc version 4.6.2 (Ubuntu/Linaro 4.6.2-12ubuntu1)
  .tmp.unity.support.test.0:

  ApportVersion: 1.91-0ubuntu1
  Architecture: amd64
  CompizPlugins: [core,bailer,detection,composite,opengl,decor,regex,animation,snap,move,place,mousepoll,vpswitch,wall,resize,gnomecompat,workarounds,compiztoolbox,grid,imgpng,expo,fade,ezoom,scale,session,switcher,unityshell]
  CompositorRunning: compiz
  Date: Tue Feb 14 11:40:18 2012
  DistUpgraded: Log time: 2011-09-27 15:36:23.910451
  DistroCodename: precise
  DistroVariant: ubuntu
  GraphicsCard:
   NVIDIA Corporation G86 [GeForce 8600M GS] [10de:0425] (rev a1) (prog-if 00 [VGA controller])
     Subsystem: Sony Corporation Device [104d:9005]
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  JockeyStatus:
   xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Enabled, In use)
   xorg:nvidia_current_updates - NVIDIA accelerated graphics driver (post-release updates) (Proprietary, Disabled, Not in use)
  MachineType: Sony Corporation VGN-FZ31Z
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-15-generic root=UUID=12e02107-7815-4276-b7ac-7bceee898897 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  UpgradeStatus: Upgraded to precise on 2012-02-02 (11 days ago)
  XorgConf:
   Section "Device"
    Identifier	"Default Device"
    Option	"NoLogo"	"True"
   EndSection
  dmi.bios.date: 12/21/2007
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: R2110J7
  dmi.board.asset.tag: N/A
  dmi.board.name: VAIO
  dmi.board.vendor: Sony Corporation
  dmi.board.version: N/A
  dmi.chassis.asset.tag: N/A
  dmi.chassis.type: 10
  dmi.chassis.vendor: Sony Corporation
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrR2110J7:bd12/21/2007:svnSonyCorporation:pnVGN-FZ31Z:pvrC6006UGW:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
  dmi.product.name: VGN-FZ31Z
  dmi.product.version: C6006UGW
  dmi.sys.vendor: Sony Corporation
  version.compiz: compiz 1:0.9.7.0~bzr2995-0ubuntu1
  version.ia32-libs: ia32-libs 20090808ubuntu33
  version.libdrm2: libdrm2 2.4.30-1ubuntu1
  version.libgl1-mesa-dri: libgl1-mesa-dri 8.0~rc2-0ubuntu5
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 8.0~rc2-0ubuntu5
  version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu3
  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 2:2.17.0-1ubuntu3
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2

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