[PLUG] Dual-headed system

Derek Loree derek at infotects.com
Mon Oct 28 23:10:12 UTC 2002


On Mon, 2002-10-28 at 14:48, Galen Seitz wrote:
> 
> > > I've not yet had the pleasure of building a dual-headed system
> > > so this is a newbie question.
> > > 
> > > Suppose I put a MDA (monochrome display adapter) and VGA card
> > > in the same computer (a PC) and connect a monochrome monitor to
> > > the MDA card and a color monitor to the VGA card. I then run a
> > > single X server that uses the VGA card and color monitor. I want
> > > the monochrome monitor to display my virtual consoles - using
> > > no X server, of course.
> > > 
> > > Is this possible?
> > 
> > Probably not, it looks like the dual-heads need to be on the PCI bus
> > (AGP is on the PCI bus).  Both video cards will also need to support
> > running multiple cards.  It would take a very special monochrome card to
> > fit this bill.
> > 
> > Anyway, the dual-head only works under X, so there is no way you will
> > get a console to display on one card, and X on the other card.
> >  
> 
> Based on this message from the lkml, it sounds like what Ed wants to do
> is possible.

Your right!  A little more digging, and I found this:

http://old.lwn.net/1999/0513/a/multihead.html

Which is a little on the old side, but the basic idea is there. 
Apparently most MDA cards do support multiple heads, not sure who told
me that they didn't.

Sorry for the confusion.

Derek Loree







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