pc18 ~ # /usr/src/xf86-video-radeonhd/utils/conntest/rhd_conntest -d -s 02:00.0
rhd_conntest: v1.2.3, git branch master, commit 8edc0c69
Checking connectors on 0x94C3, 0x0000, 0x0000  (@02:00:00):
  Load Detection: RHD_OUTPUT_DACB
  HotPlug: RHD_HPD_NONE 
  DDC: RHD_DDC_1
  DDC Line[1]: Slaves: 6e a0 
pc18 ~ #