On Wednesday 17 Mar 2004 1:01 am, Langsley T Russell wrote: > Hi all. > I bought a beautiful new Samsung 191T plus 19 inch TFT LCD monitor. > It has a resolution of 1280X1024 @75Hz. I'm running MDK 9.2. When I > attach the new monitor and reboot everything goes fine through the > entire boot process, then just as x starts to load (at least I think > that's what's happening) the screen goes black and I get a dialogue > box saying unusable signal. I don't see any way around this. > > Is there some way to setup my system using my CRT monitor so that > when I attach my LCD monitor it will produce a "usable signal"? Or is > there some way with the LCD monitor connected to do some sort of > configuration of my system to make it usable? The monitor came with > Linux setup instructions but I'll admit I don't really understand > them and if I can't get a picture at all how can I configure > anything?
My monitor would work fine at lower resolutions, but I got the same thing as you for native resolution. It seems that the monitor specification for native res was tight, and it was too close to the top end of my (ancient) video card. Close to the top end (and that can appear to be a long way off the top end) the card is limited in what frequencies it can provide. I solved it by buying a cheap but newer card. eg. If the clock rate of the card is 10MHz, thats a fastest bit period of 100ns. It can produce 100ns, 200ns, 300ns, 400ns etc, but nothing in between. Those are frequencies of 10MHz, 5MHz, 3.3MHz, 2.5MHz... If your monitor needs 3.8-4.2MHz it isn't going to work. But replace it with a card with a clock rate of 150MHz and it will work fine. -- Richard Urwin
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