Public bug reported:

when i login, the graphics appear to change modes to a higher
resolution; the login screen becomes smaller and random images and noise
show on the right and bottom few inches of the screen. when the desktop
is done loading, the graphics work fine.

i would expect to see a beautiful transition upon logging in. the
garbage displayed make the OS look bad and can also reveal portions of
previously running programs, which is bad for security.

i am using an nvidia hybrid graphics card with the proprietary driver.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: unity-greeter 16.04.2-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-62.83-generic 4.4.40
Uname: Linux 4.4.0-62-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Feb  3 09:59:02 2017
EcryptfsInUse: Yes
InstallationDate: Installed on 2016-03-22 (318 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: unity-greeter
UpgradeStatus: Upgraded to xenial on 2016-04-25 (284 days ago)

** Affects: unity-greeter (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug third-party-packages xenial

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https://bugs.launchpad.net/bugs/1661640

Title:
  upon login, shows corrupt graphics buffer until unity done loading

Status in unity-greeter package in Ubuntu:
  New

Bug description:
  when i login, the graphics appear to change modes to a higher
  resolution; the login screen becomes smaller and random images and
  noise show on the right and bottom few inches of the screen. when the
  desktop is done loading, the graphics work fine.

  i would expect to see a beautiful transition upon logging in. the
  garbage displayed make the OS look bad and can also reveal portions of
  previously running programs, which is bad for security.

  i am using an nvidia hybrid graphics card with the proprietary driver.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: unity-greeter 16.04.2-0ubuntu1
  ProcVersionSignature: Ubuntu 4.4.0-62.83-generic 4.4.40
  Uname: Linux 4.4.0-62-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Fri Feb  3 09:59:02 2017
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2016-03-22 (318 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  ProcEnviron:
   LANGUAGE=en_US
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: unity-greeter
  UpgradeStatus: Upgraded to xenial on 2016-04-25 (284 days ago)

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