title: cuda install error on Ubuntu 17.04
body: <pre><code>   abigail@abilina:~/Downloads$ sudo dpkg -i cuda-repo-ubuntu1604_8.0.61-1_amd64.deb
  Selecting previously unselected package cuda-repo-ubuntu1604.
  (Reading database ... 205999 files and directories currently installed.)
  Preparing to unpack cuda-repo-ubuntu1604_8.0.61-1_amd64.deb ...
  Unpacking cuda-repo-ubuntu1604 (8.0.61-1) ...
  Setting up cuda-repo-ubuntu1604 (8.0.61-1) ...
  Warning: The postinst maintainerscript of the package cuda-repo-ubuntu1604
  Warning: seems to use apt-key (provided by apt) without depending on gnupg or gnupg2.
  Warning: This will BREAK in the future and should be fixed by the package maintainer(s).
  Note: Check first if apt-key functionality is needed at all - it probably isn't!
  Warning: apt-key should not be used in scripts (called from postinst maintainerscript of the package cuda-repo-ubuntu1604)
  OK
  
  abigail@abilina:~/Downloads$ sudo apt-get install cuda
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Some packages could not be installed. This may mean that you have
  requested an impossible situation or if you are using the unstable
  distribution that some required packages have not yet been created
  or been moved out of Incoming.
  The following information may help to resolve the situation:
  
  The following packages have unmet dependencies:
   cuda : Depends: cuda-8-0 (&gt;= 8.0.61) but it is not going to be installed
  E: Unable to correct problems, you have held broken packages.
  </code></pre>
  
  <p>My ubuntu version is 17.04. Does this mean my Linux currently can't install CUDA? I want to install TensorFlow with GPU support.</p>
  
  <p>Per suggestion:</p>
  
  <pre><code>abigail@abilina:~/Downloads$ sudo apt-get -f install
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
  </code></pre>