Re: [info-performer] nVIDIA frame lock

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From: Rick van Haasen (rick.van.haasen++at++philips.com)
Date: 01/18/2006 01:32:20

Hugues,

Are you using the primary head? synchronisation is only done
on the primairy head, the second head of the card is not
synchronised. We faced this situation some months ago.
Someone from nvidia support told me that the 4500G is "hardwarewise"
capable of synchronisationing on the second head, but that this
capability was not yet implemented in the driver (this was a few
months ago).

Rick

owner-info-performer++at++performer.engr.sgi.com wrote on 2006-01-18 09:06:12:

> Hi all,
>
> we are trying to use our OpenGL Performer application on several
> computers with an nVIDIA Quadro 4500G card and use the frame lock
> capability to ensure the buffer swaps happen synchronously on all
> the cards. We are using GNU/Linux. Frame lock is enabled with the
> nvidia-settings utility. For swap sync, we use glXJoinSwapGroupNV()
> and glXBindSwapBarrierNV() but the displays doesn't synchronise
correctly.
>
> Has anyone faced the same problem?
>
> Thank you.
>
> Regards,
>
> Hugues De Keyzer
> de pinxi
>
>
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