Blurry video on a HP nc4200

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My boss has an HP nc4200 notebook he wants to use for presentations.
Unfortunately, we found the video output is quite unstable, i.e. there
is something like an interference wave running down the picture, every
display line seems to jiggle left and right by about 2-3 pixels. Another
nc4200 shows the same pattern, so it's probably a software problem. Both
machines are running Gentoo Linux with We haven't tried
either under Windows yet as it would mean a complete reinstallation. Any
experiences with this misbehavior? Maybe something to do with the two
different rendering pipes in the gfx adaptor? I never quite got what
they are meant for anyway, Pipe A seems to be unused here and the CRT
uses the same one as the internal display.


Re: Blurry video on a HP nc4200

Are you using an lcd/dlp projector for the presentation. The unstable image
could be caused by the conversion of digital-analog(ouput on
laptop)-digital(projector). This image shifting is common with lcd displays
with analog inputs. Its quite possible that the same symptom is applicable
to an lcd projector.
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