Could not build new xorg with FreeBSD10-Beta3

[Juanitou]

>> Ah, but I did not installed this version, which comes from the
>> experimental repository, isn’t it? I just installed the standard version
>> coming from ports (1.7.7). The AMD GPUs wiki page does not say anything
>> about updating xorg-server to 1.12.4.
>>
> You need  xorg-server to 1.12.4, but it is not from the development repo.
> You get it from "WITH_NEW_XORG=" and it is required for many newer GPUs,
> including Intel and AMD. It works for many others, but will fail to work
> with some older GPUs. In nay case, it should always build.

FWIW, following the guide, enabling WITH_NEW_XORG and installing libGL 
and dri from the development repo gives me xorg-server 1.7.7 (not 
1.12.4) and KMS for an ATI GPU.