I have 2 different AMD-APU'a, one older A8, and a brandnew A10-6800K with an integrated AMD HD8670D.
Both systems have problems with the graphics driver radeon. When boting with a fresh tumbleweed, the KDM login screen is shown, and after around 10 seconds, the system crashes, and resets. it means, the screen is getting black, and the system is booting.
Booting the 3.14 - recovery kernel, everything works, but without graphics acceleration. Booting an older 3.11 kernel, everything works fine.
What I did: - Install 13.1 => Reboot: everything works fine - Update => Reboot: everything works fine - Switch to tumbleweed => Reboot: error happens