On Sat, Jun 23, 2012 at 2:08 PM, Konstantin Belousov
<kostikbel@gmai...> wrote:

> Hmm, I probably see an issue. Please try the patch below.
>
> diff --git a/sys/dev/agp/agp_i810.c b/sys/dev/agp/agp_i810.c
> index a181ad7..c0f592c 100644
> --- a/sys/dev/agp/agp_i810.c
> +++ b/sys/dev/agp/agp_i810.c
> @@ -700,7 +700,7 @@ static const struct agp_i810_match {
>                .driver = &agp_i810_sb_driver
>        },
>        {
> -               .devid = 0x01088086,
> +               .devid = 0x010a8086,
>                .name = "SandyBridge server IG",
>                .driver = &agp_i810_sb_driver
>        },

I believe you were right with the device ID.

agp attaches now with these messages:
agp0: <SandyBridge server IG> on vgapci0
agp0: aperture size is 256M, detected 65532k stolen memory

After applying the patch, when kldload'ing i915drm, there is quite
some dmesg output (attached).

I am going to build xorg and let you know whether it works. Thanks
again for your help so far!

Best,
Riggs