Dualhead & AIGLX

Alex Deucher alexdeucher at gmail.com
Sat Jun 21 08:14:08 PDT 2008

On Sat, Jun 21, 2008 at 8:36 AM, Julian von Mendel <xorg at derjulian.net> wrote:
> Hash: SHA512
> Hi!
> One month ago, I asked why dual head wouldn't work on my system, with
> the following configuration:
> Ubuntu 8.04 (Xorg 7.3+10ubuntu10.1), Radeon 9250SE card, two 1200x1024
> TFTs connected to the VGA and DVI ports of the graphics card.
> At that time, we didn't find a solution for strange display errors.
> (The monitor connected to the VGA port got black,
> and the DVI monitor was only partly usable. One half of the DVI monitor
> and the complete VGA monitor didn't display anything except the still
> movable mouse pointer. The other half of the DVI monitor still displayed
> all windows and was usable without any problems.)
> As it turned out, everything works fine if I deactivate Compiz.
> As soon as it was switched off, xrandr --output VGA-0 --left-of DVI-0
> worked flawlessly.
> I can use both monitors now, but I miss especially Compiz's zoom
> feature. Is this a limitation of my graphics card? (If the answer's yes,
> which graphics card could handle it?) Or is it a bug, which could be
> fixed in future?

The max texture and 3D render target size on r200 was 2048x2048
pixels.  your desktop is 2400x1024.  In order to support this, fairly
major architectural changes are needed.


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