On Tue, 14 Oct 2003, Andreas Kotowicz wrote: > On Tue, 2003-10-14 at 00:36, Ian Romanick wrote: > > > Does it still make the sound if you run an external monitor instead of > > the built-in LCD? > > didn't try it out yet. > > > My guess is that it has something to do with the > > frame rate being much, much higher than the refresh rate. That would > > explain with it does it with gears (which probably runs at hundreds of > > frame per second) and not tuxracer. My best guess is that it's the > > display itself that's making the noise. Try setting the > > the noise comes from the display. I'm pretty sure about that. > > > 'LIBGL_THROTTLE_REFRESH' environment variable (to any value) and re-run > > gears. That will sync the frame rate to the refresh rate. > > setting this variable I hear no more noise. so it's actually the built > in LCD that can't refresh as fast as 800FPS and is therefore emitting > this sound. so this is a design issue but not a hardware failure, is it? I expect it's just a strange electrical phenomenon like a 60 or 50 Hz buzz that some AC appliances emit. Only this one is at a frequency related to some data transfered to the panel. Maybe it's a harmonic of the FPS. Mark. _______________________________________________ XFree86 mailing list XFree86@xxxxxxxxxxx http://XFree86.Org/mailman/listinfo/xfree86
