ubuntu 14.04 ssh very slow after cuda-repo-ubuntu1404-7-5-local_7.5-18_amd64.deb install

Hello world,

I am working with a laptop which has
GeForce GTX 980M

The laptop is running a newly installed copy of Ubuntu 14.04 server.

After I installed Ubuntu, the laptop behaved well.
It responded to ssh login in under a second.

Then, I followed the instructions I found here:
http://docs.nvidia.com/cuda/cuda-installation-guide-linux/index.html

I downloaded this file:

-rw-rw-r--  1 dan dan 2013382446 Jun  7 19:54 cuda-repo-ubuntu1404-7-5-local_7.5-18_amd64.deb

I ran these shell commands:

sudo dpkg -i cuda-repo-ubuntu1404-7-5-local_7.5-18_amd64.deb
sudo apt-get update
sudo apt-get install cuda

Installation succeeded with no problems I could see.

I rebooted.

Now when I ssh into the laptop, the laptop needs about 60 seconds to log me in.

Are any other Ubuntu people seeing this bug?