https://bugzilla.novell.com/show_bug.cgi?id=469243
User mhopf@novell.com added comment
https://bugzilla.novell.com/show_bug.cgi?id=469243#c18
--- Comment #18 from Matthias Hopf 2009-01-27 07:04:24 MST ---
Hans-Peter, you have a bad combination of graphics chip, cable, and monitor.
Apparently the chip produces an imperfect signal (which actually could even get
worse by the cable and/or adapters), and the monitor is pretty picky. We had
this several times in the radeonhd driver as well, when the electrical values
weren't right for the exact card.
What's happening is that the chip produces a high speed bit stream
bbbbbbbbggggggggrrrrrrrr, of which the least significant green bit under some
circumstances (position on stream, previous bits, etc.) gets delayed a bit too
much and is interpreted by the monitor as the highest significant red bit. Thus
you see red/yellow/black pixels where they shouldn't be.
Of course this was a gross oversimplification of the actual process (8-10 bit
coding, separate lines, etc), but you get the picture (actually, you don't ;)
sorry for the phun).
This is something only the upstream developers can resolve. Hope this helps you
understand what's going on.
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