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[Tobias Schönberg <tobias47n9e@xxxxxxxxx>]

** Description changed:

  I was testing Ubuntu Gnome 15.04 in VirtualBox. I was able to login into
  the machine a few times and run updates and install a few programs. I
  also installed the VirtualBox guest additions. Since today this happens:
  
  I log into the machine. The login is accepted and the machine does
  something for a few seconds. Then the machine jumps back to login, but
  with a random flickering. The flickering also resets the password field,
  which prevents it from being typed.
  
  So I can't login into the machine anymore.
  
  I am using a HP Probook 6570 b which I upgraded to 16 GB of RAM. The iso
  was from the 20th of January, but I did a daily sudo apt-get upgrade on
  it.
+ 
+ Video: https://www.youtube.com/watch?v=7Xpt39AKVuE&feature=youtu.be

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https://bugs.launchpad.net/bugs/1414707

Title:
  Login fails, returns to login and flickering prevents password typing

Status in gdm package in Ubuntu:
  New

Bug description:
  I was testing Ubuntu Gnome 15.04 in VirtualBox. I was able to login
  into the machine a few times and run updates and install a few
  programs. I also installed the VirtualBox guest additions. Since today
  this happens:

  I log into the machine. The login is accepted and the machine does
  something for a few seconds. Then the machine jumps back to login, but
  with a random flickering. The flickering also resets the password
  field, which prevents it from being typed.

  So I can't login into the machine anymore.

  I am using a HP Probook 6570 b which I upgraded to 16 GB of RAM. The
  iso was from the 20th of January, but I did a daily sudo apt-get
  upgrade on it.

  Video: https://www.youtube.com/watch?v=7Xpt39AKVuE&feature=youtu.be

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