Factory 64-bit DVD ISOs produce a blank screen at the stage when YaST is due to
start on a PC with Radeon graphics linked to TV via HDMI. Only way to recover
is by power-down/up. Prior to YaST starting, the display is OK. 

Installation using text appears to be possible although I did not go through
the whole process. 

The latest installation to fail was
"openSUSE-Tumbleweed-DVD-x86_64-Snapshot20141221-Media.iso".

I've verified that the official openSUSE 13.2 DVD installs OK on the system.

Installation of the factory DVD onto a laptop and also onto a different PC
linked to TV/monitor by DVI works OK.