options VESA --> where is it ?

John Baldwin jhb at freebsd.org
Wed Nov 30 13:28:57 GMT 2005

On Wednesday 30 November 2005 07:50 am, Xin LI wrote:
> Hi,
> On 11/30/05, Popov Maxim <popov.max at gmail.com> wrote:
> > In my kernel configuration i wrote this: options VESA (to get a high
> > resolution in the console). In the i386 version of the FreeBSD it
> > worked, but know it says:
> > VESA: no such option (or something like that).
> Currently VESA is not available for amd64 kernels...  I think you may
> want to do some small hacking to forcely add it, but I am not sure
> whether it works well that way...

VESA needs to talk to the BIOS of the video card.  On i386, we use vm86 mode 
to execute the VESA BIOS code, but on amd64's long mode, there is no vm86 
mode, so we have now way to talk to the VESA BIOS on amd64.

John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org

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