Jaunty - can I disable xinerama?

[Mark Greenwood]

On Wednesday 13 May 2009 09:41:20 marc wrote:
> Mark Greenwood said:
> 
> > I will probably raise this as a bug, but X confuses the living goo out
> > of me so I'd like to probe the collective wisdom here first..
> > 
> > On my Asus eee box, X has inexplicably decided I have 2 displays
> > attached, despite there only being one connector for a monitor, and that
> > being connected to my flatscreen TV's VGA port. Very odd. Anyway it
> > seems that because it thinks I have 2 screens it has also enabled the
> > horror that is Xinerama and this is causing mythtv no small amount of
> > confusion.
> 
> Yup, it seem that if you have multiple video cards and/or multiple 
> monitors X gets very confused. I'm having problems myself, and it's 
> looking like X is the culprit.

That's the thing - I *don't* have multiple video cards, or multiple monitors. And yet X thinks I do. It actually appears to be running 2 displays on the same video card and using the same monitor!

> 
> > Now that we have this new improved X which ignores xorg.conf, how can I
> > disable xinerama? Or how can I inform it politely that I only have one
> > screen?
> 
> I don't believe that X ignores xorg.conf. If you make changes to 
> xorg.conf, restart X, then examine the logs, you should see you're 
> additions being actioned.

It does ignore some things. You can still use some options, but other are completely ignored (ModeLine, for instance, appears not to do anything any more - which is annoying because that's how I got my 50Hz to work last time). Of course, this being X11, there is no (intelligible) documentation that I can find. Ho Hum.

> 
> There does seem to be quite a bit of confusion, though, about what's 
> going on.
> 
> -- 
> Best,
> Marc
> 
>