Ok, I _finally_ have an update on this.  I put another hard drive into
the system, booted an Ubuntu 16.04.1 live DVD I burned today, and
installed Ubuntu 16.04.1 on this test hard drive.  When I booted the
live DVD, the video issue occurred, so I re-booted and specified the
"nomodeset" parameter.  After doing that, I was able to get the system
to boot and was able to successfully install Ubuntu 16.04.1.  After the
installation completed, the system booted *without* my having to specify
the "nomodeset" parameter and the monitor was running at full resolution
(1600x900 or something along those lines).   So, I thought maybe the
issue had been fixed with the 16.04.1 release of Ubuntu.  I removed the
test hard drive, reinstalled the primary hard drive, booted the system
to Ubuntu 14.04.2, and performed an _upgrade_ to Ubuntu 16.04.1.  After
the upgrade completed, the video issue returned *sigh*.  However, I'm
now able to get SSH setup so I can collect the requested logs.

I'm confused as to why a fresh install of Ubuntu 16.04.1 works but the
upgrade doesn't.  From what I understand, the AMD video driver is in the
kernel and I would think the 4.4 kernel would be the same, regardless of
the system being installed fresh vs being upgraded.

As of right now, the primary hard drive has Ubuntu 16.04.1 installed,
the video issue is present, and kernel version 4.4-31 (I believe) is
running.   Once I'm able to get SSH setup and get the logs transferred
to another system, I'll attach them to this bug report.

Thanks!

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https://bugs.launchpad.net/bugs/1598935

Title:
  Ubuntu 16.04 won't properly boot due to radeon module issue

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