The bug has occurred on the same hardware a couple of times now. The installation of 16.04 works, and I am able to use the desktop.
It is the upgrade that introduce 16.04.1 onto the hardware that appears to cause the issues.
After upgrading I am prompted for a password which when entered, starts the desktop wallpaper, and then appears to hang.
Note that I am able to log onto the laptop using the Guest user, and can get to the desktop.
After reading around the 16.04.1 upgrade it appears that there are changes to the lightdm and gnome software - which appears to suggest that my hardware is having issues with these new packages, and potentially a 'permission' issues with the new packages.
Additional Information -
The bug has occurred on the same hardware a couple of times now. The installation of 16.04 works, and I am able to use the desktop.
It is the upgrade that introduce 16.04.1 onto the hardware that appears to cause the issues.
After upgrading I am prompted for a password which when entered, starts the desktop wallpaper, and then appears to hang.
Note that I am able to log onto the laptop using the Guest user, and can get to the desktop.
After reading around the 16.04.1 upgrade it appears that there are changes to the lightdm and gnome software - which appears to suggest that my hardware is having issues with these new packages, and potentially a 'permission' issues with the new packages.