Synchronization precision

Nicolas Dufresne nicolas at
Tue Jul 2 00:34:07 UTC 2019

Le lundi 01 juillet 2019 à 17:44 -0500, RiccardoCagnasso a écrit :
> Nicolas Dufresne-5 wrote
> > I believe some vendors have a solution, but they kept it for themselves. I
> > have tackled the idea, but the first thing I notice (with seperate
> > screens)
> > is that I would also need to sync the display clock, and that requires
> > more
> > hardware.
> Well you can sync the display clock - in theory - with nvidia quadros and
> they are as cheap as 100 euro.
> If you need to sync the display clock of different computers, you can use
> quadro sync cards. They are sure expensive and probably a mess to configure
> on linux. But not nearly as expensive as the solutions that are used to
> tackle the problem in the industry now.
> If we can get near-perfect sync on the same monitor, then the problem should
> be solved with hardware and OS configuration. But, as far as I know, at the
> moment, the problem presents itself on the same video card and even on the
> same monitor.

This last sentence surprise me. I did quite some test, and on the same
monitor, I have never seen a de-sync. But the was not with Arun library
though. Maybe you need a bit of a debugging sessions.

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