Re: X arch

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Date: Mon, 21 Jul 2003 22:14:21 -0500

"Wayne Throop" <throopw@sheol.org> wrote in message
news:1058815196@sheol.org...
> : "Mithaz" <abinayshunyashunyaek@yahoo.com>
[...]
> : I am a comp sc. student and have an evil :-\ nvidia card. I have
> : been (un)successful in using dual monitors the nvidia way i.e. to
> : stretch one desktop to two monitors. This is very inconvenient as a
> : maximized window spreads over two monitors. I wish to have one
> : virtual desktop on each monitor. I want to understand --what will it
> : take to achieve this.
>
> Well... basically, you'll need to run two different X servers,
> with different configs. If you already have a spanning config,
> you should be able to tease it apart into two configuration files,
> and use one for one X server, and the other for the other. The
> icky issues will have to do with the input devices; I have seen
> folks reporting being driven to hacking the X server code so that
> a second server process can be made to use *only* (eg) a usb
> keyboard and mouse, rather than assuming it should be using a
> keyboard and mouse asociated with some VT.
>
> So. Those are the obstacles: partitioning the config data into
> two separate configuration files, and then how to deal with
> keyboard and mouse input for the second X server.
> You end up not being able to drag windows from one display
> to the other, so be aware of that problem.
>
> Note: once you are up and running, look into x2x. It's a slick
> way to use only one keyboard/mouse to control two desktops (even
> if the two desktops are served from completely different machines).
> X2x doesn't allow movement of app windows between the screens, but
> the mouse moves smoothly between the screens, and keyboard focus
> follows naturally. And the primary selection is synchronized
> between the two screens.
>
> : LFS explains quiet a bit about X installation but not how things fit
> : in together. I am interested in looking at the big picture and was
> : hoping someone could show me if there is a X bible or something
> : similar
>
> Your summary of the problem above applies here: there are sweeping
> generalizations, and there are detailed man and info pages and howtos,
> but the middle level of detail isn't very available.
>
> But query: do you know what each of these executable images or scripts
> do wrt the big picture: (X, xdm (or kdm or gdm), startx, .xinitrc or
> xsession, xauth, twm (or whatever window manager)), or would a brief
> overview from memory at that level be of any use?

Thanks for the input.
I thought over running 2 X servers. But as you said, one cannot move apps
between them. The sharing of devices can we fixed in a dirty way. I was
hoping to hack Xerver to make it kind of slave X which displays only one
virtual desktop. This would solve the problem of moving apps between
desktops and sharing of devices. I guess I am being to ambitious. But only
way to find it out is to know how things work and fit together.
I do understand (at least I think) the function of X , xdm, the conf and
scripts but dont have an authoritative knowledge. I believe your overview
will be helpful in filling gaps and making things clearer.
If you or someone would write it down then I can promise to put it up on my
web server for everyone else.
Thanks in advance

--
AB

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