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I'm running Slackware 10.2 on a P3 with a RIVA TNT2 32MB AGP card. A week or so ago, I noticed that the rendering in X exhibited horizontal shadowing, wherever content was rendered (i.e. on lines with only white space, there is no shadowing).
I have tried changing the driver in xorg.conf, with no results.
I have tried a different monitor, with no results.
I have re-installed X, with no results.
I have re-installed the nVidia driver, with no results.
I have installed a different RIVA TNT2 32MB AGP card, with no results.
I'm really at a loss now. The problem is only evident in graphics mode, not text mode, i.e. the picture is sharp and nice at the console, but not in X. The only things I can think of now are:
1. There is some kind of signal interference that's new.
2. The AGP slot is fubar all of a sudden.
3. Voltron, the Norse god of poorly-formed metaphor, has decided that my computer experience should be limited to my workplace, and not at home.
I don't see anything wrong with this screenshot. Could it be that your monitor is actually at fault?
That's certainly possible; but as you probably read, not only have I tried different video cards, I've tried different monitors. Also, I'm not quite certain at what layer in the video display system the screenshot info is taken. I wonder if it's possible that the screenshot was taken at a lower layer than the artifacting started. That's consistent with the monitor being the problem, as the monitor is the last layer; but since I've tested multiple video configurations, it doesn't seem likely that all the equipment would simultaneously fail in the same fashion.
Maybe I'll move the system to another room and see if the problem might be interference of some kind.
Dropping the ATi Radeon 9000 in worked. I suppose it's unlikely but not of trivial probability that I'd have two identical cards that degraded in very similar ways.
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