Re: multiple displays

Thanks for your reply Alex,

At this stage i'm looking for the simplest path to supporting  
multiple local displays driven by one video (2 CRTCs) card or by two  
separate cards. It seems there exists solutions for some combinations  
of video hardware. It's also clear that I need to understand a bit  
more about the video hardware itself. Thanks for the references.

Rob

On 28/11/2006, at 5:46 AM, Alex Deucher wrote:

> On 11/26/06, Robert Carter <[email protected]> wrote:
>> I'm interested in using multiple displays outside the X11
>> environment. Currently i'm trying to get mesa built against DRM so it
>> can render 3d using the GPU. What kind of issues should I be
>> considering in order to use DRI more than one display? Are there any
>> existing documents that might help me with this research?
>>
>
> I assume you are taking about video cards with multiple crtcs?  The
> coordinate limits of the 3D engine are the biggest issue.  r100/r200
> radeons for instance have a coordinate limit of 2048x2048, so the
> largest surface you could successfuly render to would be limted by
> that.  Also, if you are not using X, you'll have to add support for
> multiple crtcs to either the fbdev driver for your card, or the write
> a new driver that provides similar functionality.  For multi-card 3D
> rendering you might want to take a look at dmx/glxproxy and chromium.
> These provide methods for breaking down the rendering and sending it
> to multiple hosts.
>
> Alex
>
>> The diagram is this page may help explain:
>> http://organicdesign.co.nz/Peerix
>>
>> The relevant part is the left most column.
>>
>> Thanks for any help.
>>
>> Rob
>>
>>


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