[KLUG Members] Dual KDE monitors.

[Bryan J. Smith]

On Wed, 2002-05-15 at 22:09, Adam Bultman wrote:
> Am I correct in not being able to make the computer see
> both monitors as one 'Desktop' like in windows?

No, you are not.  X-Windows supports an _endless_ number of video
displays.  They are usually assigned sequentially as DISPLAY :0, :1,
etc...  They can be real or virtual.

You tie multiple DISPLAYs together as one (e.g., a single :0) with
Xinerama.  E.g., if I have a 3dfx PCI card that's :0 and a Matrox G200
AGP card that is :1, I can use Xinerama to bind them together with just
a simple option in my xdm (or gdm in the case of Gnome, kdm in the case
of KDE) config file.

> Is there a config file I'm missing?

Yes.  For KDE, it should be under /etc/X11/kdm/.  You just add
"+xinerama" to the line that calls X.

You, of course, have to have X all setup to support all the displays.

NOTE:  The above does NOT apply to video drivers that use an "unified
framebuffer" so X doesn't see them separately.  E.g., nVidia nView (fka
TwinView) and Matrox drivers.

> I think it's do-able, but I'm not sure how.  I thought I had
> everything set up correctly.  I have dual monitors, but they are
> separate entities.  Am I mistaken?

Yes, as above.

-- Bryan

-- 
The US government could be 100x more effective, and 1/100th the
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---------------------------------------------------------------
Bryan J. Smith, SmithConcepts, Inc.   mailto:b.j.smith@ieee.org
Engineers and IT Professionals     http://www.SmithConcepts.com