[mythtv] Audio sync problem with recent CVS build

[Robert Johnston]

On Apr 12, 2005 2:58 AM, Tom Hughes <tom at compton.nu> wrote:
> I've done some investigating now and it seems that despite
> glXQueryExtensionsString indicating that GLX_SGI_video_sync is
> supported any call to glXGetVideoSyncSGI or glXWaitVideoSyncSGI
> will fail.
> 
> Unfortunately by that time myth is already committed to using
> OpenGL sync and it just logs the error and carries on as if the
> call had worked.
> 
> Probably the thing to do is to try calling glXGetVideoSyncSGI in
> OpenGLVideoSync::TryInit and return false if it fails, that way it
> would fall back to RTC instead.
> 
> It is of course an interesting question as to why those calls are
> failing on some systems...

Something else to check while OpenGL Sync is being initialised is that
VSync is turned on. I know the NVidia drivers can change wether VSync
is turned on or not independant of the application (In
NVidia-Settings).
-- 
Robert "Anaerin" Johnston