YaST->Hardware->Hardware Information or KInfocenter f.e.
If I see this correctly, you have an AMD Radeon HD 6250.
If you didn’t install any driver yourself you would be using the standard “radeon” driver.
You might try the proprietary fglrx driver instead, that might have better support for the powermanagement features than the radeon shipped in 13.1: http://en.opensuse.org/SDB:AMD_fglrx
To check whether it’s installed, search for “fglrx” in YaST->Software Management, or run:
zypper se fglrx
(an ‘i’ in the first column means that the package is installed)
To check whether it is used and working:
Install “Mesa-demo-x” and run:
glxinfo | egrep "(render|OpenGL)"
AFAIK, fglrx comes with a program “fglrx_gears”, run this to check whether the driver is working, or run AMD’s catalyst control center (I don’t know the exact command, but you should find it in the K-Menu).
YaST and kinfocenter should show you the driver as well as already mentioned.
And you can look into /var/log/Xorg.0.log to see which driver is loaded/used and whether there are any problems.