[mythtv-users] mythtv SVN, and xorg w/ dual DISPLAYs (not twinview) questions
Gary Dezern
gary at garyndenise.org
Tue May 16 07:53:15 EDT 2006
> Typically, one instance of the X server manages a display,
which is
> composed of one or more screens, a pointing device, and
a keyboard
> device. In a typical, single server configuration,
that display will be
> called ":0", which has an empty
hostname part to the left of the colon,
> indicating that the
server is running locally, and a "0" indicating it's
>
display number zero. If there's only one screen in that display, it
will
> be named ":0.0". A second screen, typically a
monitor connected to a
> second output of the same video device or
another video device under
> control of the same server would be
called ":0.1".
In this instance (:0.0 and :0.1) can
different users control the two different screens? ie: user
"mythtv" controlling :0.1 which is a DFP (running the FE), and
xdm/gdm/kdm owning :0.1 which is a CRT? This is my overall
goal. It's annoying me that I have no physical console access to the
machine with myth's FE. Yes, I can do Ctrl-Atl-F1 to switch away
from X to pty1, but doing so results in the FE (and X) freezing until I
switch it back. I can also ssh into it, or run vncserver, etc.
However, none of that solves my issue: Software (possibly
misconfigured) is dictating how I use my hardware.
> If, on
the other hand, you have two instances of X running, each will
>
manage a display, one of which will be called ":0" and the other
":1".
> This is often the case when one has multiple GUI
logins and switches
> between them with Ctrl-Alt-F?. In that case,
the different X instances
> are sharing the same physical
devices.
This, obviously, would allow different users on the
different displays. Can it be done with a single video card?
Not sure. Here's a quote from the HOWTO you posted below (which is a
quote from nvidia's readme):
Graphics chips that support TwinView (Appendix G) can also be
configured to
treat each connected display device as a separate X
screen.
Sadly, I've already become confused what the different between a
"display" and a "screen." At least, I think,
your earlier paragraph might have clarified it some. In
localhost:x.y, the 'x' is a display, and the 'y' is a screen. I
think. Heh...
> That Howto is in the Gentoo Wiki, but
contains very little
> Gentoo-specific information. You probably
don't need or want Xinerama,
> so read the section about multiple
screens.
Ah, this might have been what I originally read.
(I'm using gentoo as my distro.) So much information. I miss
text consoles and CLI's.
Take care
Gary
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