I am currently having issues building Server 2012 machines at the moment in vSphere 5.1.0, I've read alot of posts as to what fixes this, apparently there was a patch which fixed this which took you up to the above ESXi version (We have this) but we are still experiencing issues when building Server 2012 / 2012 R2 machines. We have enabled 3D acceleration (this is greyed out when you build a machine with Server 2008 R2 / Server 2012) So I tried setting the OS to Windows 7 64-Bit which did allow 3D acceleration). But still after building this I got the known "Black Screen of Death" with a command prompt box.
This generally happens after logging into the machine with the administrator, instead of showing the desktop I just get the above.
Has anyone encountered similar issues and if so, how did you manage to get around it?