Whereas I've used linux on several systems with AMD/ATi cards and they've always been flaky.
It only happens on a reboot, not while I'm using it, and only maybe once a month, but it's still annoying because I have to ssh in to reinstall the drivers every time.
And here I was all hyped that AMD would be my savior. I hope you're wrong!!
I'll find out for myself the next time I upgrade and I switch the current AMD card that I'm using on my Windows PC into the ubuntu system.
Anyway just basic stuff wasn't working and IIRC the GPU fans would stay at 100% all the time. Just terribly broken.
I'm overall happy with the .run drivers from the site except when they come up at the wrong resolution and need reinstalling as I described.
If you're manually installing them outside of Ubuntu package management then you need to reinstall them every time you upgrade your kernel. (This is a design decision by Linux to make life harder for closed source drivers, there's nothing Nvidia can do about it)
My next linux GPU is AMD.