Kent Schumacher wrote: > > HOEFFNER at dcmir.med.umn.edu wrote: > > > > Hi > > > > Weird hardware type question. We bought 3 Dell machines with winders on them > > and then installed RH6.2 about 3/4 year ago. A couple of months ago some people > > started complaining about a high pitched whistle/whine/not sure how to describe > > it coming from one of them in Linux. Then, I couldn't hear it, but this last > > week or so I can (it's pretty loud and quite annoying). It only happens on this > > one machine and only when it kicks into graphics mode. It doesn't do it in > > windows at all. The other machines don't do it either. I had someone else > > install RH on these machines, but they should all have the same driver. > > > > Is there anything I can do about this? Since it's only in RH, which Dell > > refused to install, it would seem I'm SOL when it comes to turning to them. > > > > Any advice appreciated. > > > > Thanks > > > > > A high pitched whine in a monitor is almost always a capacitor pushed past > it's current design limits (capacitors seem to degrade with age). My guess > is that linux is running the monitor at a higher refresh rate. You can > confirm this if your monitor has an on screen display that reports > refresh rates. > > If this is the case, you can modify or insert (or uncomment) a modeline in > XF86Config that has a lower refresh rate. > > As a reality check, you could press [ctrl][alt]+ or [ctrl][alt]-. If your > XF86Config has multiple resolutions enabled, your screen resolution will change > when you press those key combinations. My guess is the whine will get worse > or better. I just read Dave Sherohman's post, and I think his guess about the flyback transformer is more likely than mine. Kent