On Apr 12, 2005 2:58 AM, Tom Hughes <[EMAIL PROTECTED]> 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 _______________________________________________ mythtv-dev mailing list [email protected] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-dev
