With -current/i386 xsrc / kernel, I just tried a X -probeonly and saw:

(II) VESA(0): VESA VBE OEM: Intel(r)915GM/910ML/915MS Graphics Chip Accelerated 
VGA BIOS
(II) VESA(0): VESA VBE OEM Software Rev: 1.0
(II) VESA(0): VESA VBE OEM Vendor: Intel Corporation
(II) VESA(0): VESA VBE OEM Product: Intel(r)915GM/910ML/915MS Graphics Controlle
r
(II) VESA(0): VESA VBE OEM Product Rev: Hardware Version 0.0
(II) VESA(0): VESA VBE Capabilities: 0x00000001
...
(II) Loading sub module "ddc"
(II) LoadModule: "ddc"
(II) Loading /usr/X11R6/lib/modules/libddc.a
(II) Module ddc: vendor="The XFree86 Project"
        compiled for 4.5.0, module version = 1.0.0
        ABI class: XFree86 Video Driver, version 0.8
f000:4a9a: 01 ILLEGAL EXTENDED X86 OPCODE!              <---------- !?
(II) VESA(0): VESA VBE DDC not supported


Cheers,

Patrick