On Wed, 28 Nov 2001 [EMAIL PROTECTED] wrote:
> Frank Kujawski said...
> |
> |I was wondering what solution would be best for multi-head displays.
> |Would it be a card that supports dual heads or two cards?
> |I suppose the next question is what would be done on the screens, a
> |primary high res workspace for office type issues and a secondary low res
> |for picutres/movies etc. A second option is for both monitors to be the
> |primary work space and for windows to move natraly between the two.
> |What type of cards would work best for each situation and why?
>
> I've been kind of boggled that this is
> such a big deal. In 1992, I was running
> the Graphics Product Verification Test
> (PVT) lab at IBM/Austin for the R/S 6000
> line. We did a lot of multi-head testing,
> including on occasion one of every type of
> graphics adapter we could cram into a big
> box. I recall more than once running six
> diverse adapters together, including a B/W
> and their big dog 3D engine, and various
> things in between. We tested them as
> separate displays, and as screens of one
> display. It tended to all work pretty
> seamlessly. Pretty amazing, and *very*
> cool. [1]
>
> So was this just IBM's heavily modified
> X server, or was this based on common,
> multi-head code. Why is this not readily
> available in XFree86? Is it the limitations
> of the PC architecture?
>
The XFree86 project showed a 12 headed system running
on an IBM Netfinity with 12 Matrox G200 PCI cards at LinuxTag
in Germany a year or two ago. I'm currently running two
cards on my machine - a PC with an NVIDIA GeForce2 GTS AGP
on one head and NVIDIA TNT2 PCI on the other. When I worked
at VA Linux Systems many people had 2 and 3 headed systems
with XFree86 4.0, most of them running with Xinerama as I am now.
This stuff is readily available with XFree86, but only with
particular video drivers.
Mark.
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