Date: Mon, 30 Jun 1997 10:20:14 +0930 (CST) From: Michael Smith <msmith@atrad.adelaide.edu.au> To: mark@quickweb.com (Mark Mayo) Cc: multimedia@FreeBSD.ORG, hackers@FreeBSD.ORG Subject: Re: Monitor shadows? Message-ID: <199706300050.KAA22072@genesis.atrad.adelaide.edu.au> In-Reply-To: <19970629195452.32243@vinyl.quickweb.com> from Mark Mayo at "Jun 29, 97 07:54:52 pm"
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Mark Mayo stands accused of saying: > Hi. I'm noticing a strange thing happening on my computer. At higher > refresh rates (above 72Hz), I see what I can only describe as > "shadows". For example, the borders of windows seem to have a little > grey fading border on the right side. If the mouse is over a simple > green background, I can really see the "shadow". It's quite annoying > - even the black letters on the white background of my rxvt leave a > little grey silhouette to the right. > > I'm guessing it happens (or more likely is visible) whenver you have sharp > contrasting colors next to each other. > Has anyone ever seen anything like this before? I'm not sure if it's > the video card or the monitor. I'm going to bring another monitor > home from school some day to see if it behaves similarly (which > would mean it's the video card). I suspect it's the monitor though; > The problem seems to get worse as I approach the maximum refresh > rate of the monitor (which is why my hunch leans towards a monitor > problem). Yes, many times. It's an indication that you've exceeded the video bandwidth of your monitor, either because you are overdriving it frequency-wise, overdriving it signal wise (so the input amplifiers are driven into clipping), or because the bandwidth has degraded, often due to aging of capacitors (particularly electrolytics). > I'm hoping this is some sort of gun alignment problem or something.. Nope. > MAG Innovision MX17F G (the one with the LCD thing on the front). Same I've got one of them; bleagh. Mostly mine is just fading; it jitters a little too, but it certainly isn't ringing or smearing, and I drive it pretty hard at times. > Mark Mayo mark@quickweb.com -- ]] Mike Smith, Software Engineer msmith@gsoft.com.au [[ ]] Genesis Software genesis@gsoft.com.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control. (ph) +61-8-8267-3493 [[ ]] Unix hardware collector. "Where are your PEZ?" The Tick [[
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