I think this sort of thing is pretty common. I started hearing graphics accelerators back in the Matrox Millennium days and have been hearing them since. Not sure if it's the video hardware itself making the noise or the power supply. Something like gears probably draws more power than something like tuxracer. Mark. On Mon, 13 Oct 2003, Andreas Kotowicz wrote: > Hi, > > I have a big problem with glxgears and my laptop. whenever I start > glxgears I get a high pitch tone coming from my laptop screen. If I move > the window to the corners the frequency of the tone rises. is this a > xfree driver error or is my gpu or my display broken? I'm using Xfree > 4.3.99 snapshot 13 on a linux 2.6.0-test7 kernel. I tried different AGP > modes (1,2,4) but the behaviour is still the same. playing games like > tuxracer doesn't show this problem. > > andreas > > _______________________________________________ > XFree86 mailing list > XFree86@xxxxxxxxxxx > http://XFree86.Org/mailman/listinfo/xfree86 > _______________________________________________ XFree86 mailing list XFree86@xxxxxxxxxxx http://XFree86.Org/mailman/listinfo/xfree86