On Wed, 2003-09-10 at 17:09, Jim Gettys wrote:
> 
> While the X server has had the XSync extension for a long time,
> the operating system "hooks" to allow X to synchronize with
> external events (e.g. vertical sync, sample clock of audio
> streams, etc) have been absent in open source systems. XSync
> was developed in the days of engineering workstations 10 years
> ago, and was debugged with such kernel support.

FWIW, the DRM has provided synchronization to the vertical refresh for a
while.

> Recently Alan Cox has done some work for Linux support of
> vertical retrace (and potentially audio sources) to provide the
> needed kernel hooks for the X server.

Any pointers to that?


-- 
Earthling Michel Dänzer   \  Debian (powerpc), XFree86 and DRI developer
Software libre enthusiast  \     http://svcs.affero.net/rm.php?r=daenzer

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