Yep, that’s what I gathered as well during the last week. Appears fglrx no longer works in 14.04 and isn’t even support in 16. So far any attempts of forcing fglrx to install broke my graphics entirely as well (64bits) so that doesn’t seem to be a feasible solution.
As described here, fglrx seems to conflict with xenial parts of Ubuntu that where introduced when 16 launched
askubuntu.com/questions/819777/s … ade-xorg-s
Downgrading to wily as described here didn’t work at all for me though.
What if find weird is that GD worked perfectly fine on my previous, older 14.04 install. I just have no idea what was different with that, maybe it used some older driver for some reason? I can’t figure it out so far, but I still think remaining at 14.04 is a more likely to support GD at all. 
