Yes, this is the code of input devices (93). System stops on booting at this point so it has some issues. https://docs.google.com/viewer?pid=bl&srcid=ADGEESii7vAK2Yxynt5DmlbmMKPivZ0JR2m6hkMsB4O3I96K1TC2AKjuSvLB_VgPd_HcNVaHRIqQt5lNWkRQ8_kW3JxoMBWM0bwuCuc2ZEFLANpaPsKiN6WARbDOfBUpZaazMK_No9bP&q=cache%3AbdG7iqliuwYJ%3Adownloadmirror.intel.com%2F19482%2Feng%2FDP67BG_TechProdSpec.pdf%20post%20code%2093%20dp67bg&docid=aec480b079089c3373edf6bd29a02a3c&a=bi&pagenumber=76&w=799
try another keyboard and you should be fine - without adaptor, directly with USB connector.
BTW, I have Logitech MK320 (wireless keyboard) and it works fine with my DP67BG