Re: Installed ATI drivers, now computer restarts at login screen.
AdamW, I'm experiencing similar problems with an ATI Radeon HD 5450 on Fedora 16. It is true that the drivers are incompatible with the kernel and xorg in F16 beta. The Radeon driver however, at least gets the resolution right and the display working, but it is unusable due to bad flickering whenever the screen gets an update ( a window is moved, or a line of output is printed in a visible terminal window).
I didn't try fedora 15 though, I am currently considering getting rid of the GPU, since the onboard graphics (intel sandybridge) seem to be working much better and faster than the ATI GPU.