ports/148712: [UPDATE] x11-drivers/xf86-video-ati to v6.13.1

[John Hein]

Gary Jennejohn wrote at 14:08 +0200 on Aug 28, 2010:
 > On Sat, 28 Aug 2010 13:35:22 +0300
 > Andriy Gapon <avg at icyb.net.ua> wrote:
 > > Do you have libdrm installed?
 > 
 > Yes - /var/db/pkg/libdrm-2.4.12 - which seems to be slightly out of
 > date.

If you want a newer version of libdrm (and Mesa), define WITHOUT_NOUVEAU.
See the 20100207 entry in ports/UPDATING or look at libdrm/Makefile.