[ltp] Use external monitor (disable pixel stretching?)

[Tom Grydeland]

Hello, Thinkpaders!

I am trying to use a TP T30 with an external projector.  I am able to
connect a projector to the VGA out and get a picture with no trouble.
The resolution of the thinkpad (1400 x 1050) is greater than that of the
projector (1024 x 768) which leads to problems.  I end up seeing only a
section of the total screen area, with the top right corner of the
screen seen through the projector being close to (but not exactly equal
to) the top right of the 1400 x 1050 screen, so a large section of the
left hand side of the screen and a sizable chunk at the bottom is lost.
In addition, some lines in the middle of the display do not appear in
the projector image.  This picture is identical for console
(framebuffer) and X display.

I have tried setting a lower resolution in the X configuration, but the
X server "stretches" the pixels to fill the whole of the screen, and I
end up with a partially visible screen of stretched pixels -- not
entirely satisfactory.

I have also tried to set up a multi-head layout using separate Device
sections (screens 0 and 1) for the Radeon device and separate Screen
sections for the internal and external screens, but this results in the
projector showing only a "melting" image for a few seconds before
returning to the truncated mirrored view.  There is also an error
message in /var/log/XFree86.1.log about

(EE) No Screen section called "ska"
...
Fatal server error:
no screens found

(I am not even sure this card supports multi-head, to be honest)

Has anyone got a T30 with 1400 x 1050 native resolution to talk to an
external monitor or projector with lower resolution, and if so, would
they be willing to let me know how?

Thanks in advance,

-- 
//Tom Grydeland <Tom.Grydeland@phys.uit.no>   plain text e-mail preferred

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