Go back to unity for the time being. I haven't figured out wtf is going on there. Maybe the compositor? The ONLY way I have been able to get the AMd driver to work on ubuntu is a 100% stock ubuntu. I had the mistake of having my ubuntu install with the gnome 3.20 PPAs and boy let me tell you did that screw things up royally. I gave up after an hour and had to reinstall.
I also tried installing kernel 4.7+AMDs patches and the kernel worked great.. X not so much. Same kernel was flawless on Fedora 24, though.
Yep, the "PRO" comes from FirePRO AFAIK. We originally talked about doing three stacks - "all-open", "non-pro" (consumer/client hybrid) and "pro" (workstation hybrid) - but then decided that the all-open stack was maturing quickly enough that it could become the primary client stack so we settled on a two-stack model. We still have some work to do before the transition is complete (Vulkan / OpenCL are still closed, the all-open GL driver only recently hit the 4.3 level needed for newest games and so performance tuning is just starting) so at the moment the "pro" stack is also doing double-duty as a client (consumer) driver.
I dont think my card supports it either :( So i cant even test.
I'm guessing its mainly the pro drivers causing issues?
Thanks for the advice @wendell I also had to do a re-install the system as it was completely un-usable after updating the driver, so I re-installed Ubuntu Gnome but I will re-install Unity as per your advice.
Like I said I'm pretty new to the world of Linux and I'm still learning what's what so apologies to everyone if I sound a bit vague :-D
AMD had the idea of releasing cards with drivers that wernt ready, leaving us in a bit of a half working state. At the same time they stopped development of the old propitiatory drivers. Leaving us in a half broken state.
So we have a limbo of literally no complete graphics stack being available unless you use a specific ubuntu or an old distro.
That said, they are actively developing the open drivers and they progress every release. You can see specific mesa progress here https://mesamatrix.net/
I gave the proprietary driver a go a few months back, performance was terrible on Ubuntu Gnome using Steam games such as CS:GO and were unplayable. I have tried it again with the driver that Ubuntu uses after a clean install and performance was better but was still a bit choppy.