[ltp] Clone display via VGA output on Thinkpad T41p, Radeon M10 (FireGL T2), Xorg 7.3

[Andreas Ntaflos]

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Hello list,=20

I have a Thinkpad T41p with a Radeon M10 (FireGL T2) using the open source=
=20
Radeon drivers with Alex Deuchers patches [1] from git, running Kubuntu 7.1=
0=20
with Xorg 7.3.

What I need to know is how to set up a xrandr to clone the LVDS screen to t=
he=20
VGA port? The typical scenario for this is connecting a beamer to the VGA=20
port, for example when doing a presentation or a lecture, so that the same=
=20
picture is displayed on the laptop screen and the beamer canvas. The beamer=
=20
typically only supports resolutions up to 1024x768.

In the olden days I had to switch between

Option          "CRT2Position"          "Clone"

and

Option          "CRT2Position"          "RightOf"

in xorg.conf (and restart the X server), depending on what I wanted.

How is this done with the new Xorg 7.3 and xrandr 1.2? How do I get the sam=
e=20
picture on both the LVDS and the VGA output?

I have read the ThinkWiki article [2] googled much and found out about the =
bug=20
where the second screen is positioned /inside/ the first (primary) screen. =
I=20
suffered from that, too, when trying to set up the lecture I had to give a=
=20
week ago.

So my questions is: how do I clone the LVDS display these days? Is it=20
possible? How to do it? I can provide further configuration details if=20
necessary but more I'd like to know the standard way to configure this setu=
p.

Thanks in advance!

Andreas

[1]=20
http://mailman.linux-thinkpad.org/pipermail/linux-thinkpad/2007-August/0399=
05.html
[2] http://www.thinkwiki.org/wiki/Xorg_RandR_1.2
=2D-=20
Andreas "daff" Ntaflos
Vienna, Austria

GPG Fingerprint: 6234 2E8E 5C81 C6CB E5EC  7E65 397C E2A8 090C A9B4

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