It's probably for your kernel version , I see in
http://support.amd.com/en-us/kb-articles/Pages/latest-linux-beta-driver.aspx :
System Requirements: Linux kernel 2.6 or above (up to 3.13)
I think your kernel version is superior.
What really matters is the video driver , what else can do without and it is easy to find
You should start thinking about looking for another distro that is best served . I see that in Bodhi Linux Web:
Notice
Bodhi services (Package Repository, Appcenter, and Forums) will be down for maintenance from 10pm Eastern until midnight.
If you like lightweight desktops Xfce recommend you let me so if you like Ubuntu , Xubuntu would be a great option.
If you prefer stability at low power consumption , look Manjaro , of course not have as much software as Ubuntu and its derivatives .
Kind regards .