Subject: Re: bge on amd64
To: Chuck Silvers <>
From: Thor Lancelot Simon <>
List: tech-kern
Date: 08/28/2005 16:34:02
On Sun, Aug 28, 2005 at 09:09:56AM -0700, Chuck Silvers wrote:
> hi,
> I recently got an amd64 box and discovered that the built-in bge
> doesn't work (all received packets are garbage, though transmitted
> packets appear to be fine).  the problem is caused by some of the
> host memory having physical addresses larger than 4 GB...

You might want to check the BIOS settings on the machine for "IOMMU mode"
or "remap addresses > 4GB" or something like that.  I don't know exactly
what these do on amd64 -- I can guess, but I don't _know_ -- but since
you shouldn't need them, it's probably best to leave them off.