Can't boot 14.04

[Ralf Mardorf]

On Sun, 6 Nov 2016 07:16:08 -0600, Jim Byrnes wrote:
>Right now I am booted to 12.04 on the same machine.  What do I need to 
>do to fix the problem?

Hi,

you first need to find out the cause. Since you could access the 14.04
install by a 12.04 session, take a look at the log files.

If you suspect that the graphics driver does cause the trouble, start
taking a look at the X log file and since it happens when logging in,
take a look at the display manager's log files, starting with the
greeter. Maybe the display manager is lightdm.

$ sudo -i
# grep EE /mount/point/var/log/Xorg.0.log
# less    /mount/point/var/log/Xorg.0.log
# less    /mount/point/var/log/lightdm/<some_log_file>

Regards,
Ralf