Re: [Xorg] Local Multi Users

[Svetoslav S. <sv...@gm...>]

> Svetoslav:
> 
> Thank you for your response. But I'm not sure I expressed myself
> clearly. My problem is quite strange and understanding it well is
> necessary for anyone to help us.
> 
> The problem is that we need to make four monitors work with one desktop.
> Okay, but we only achieved this using three. Using four is hard.
> 
> First let me comment a little bit on the past emails:
> 
> On Fri, 2004-06-25 at 06:13, Svetoslav Slavtchev wrote:
> 
> > > Having to use an "order" is no good.  People on a multi-user
> > > machine logs in and out on the different consoles all the time, and X
> > > obviously restarts everytime. 
> > 
> > does X restarts really ? :-)
> > <snip from my gdm conf>
> > # If you are having trouble with using a single server for a long time
> and
> > # want gdm to kill/restart the server, turn this on
> > #AlwaysRestartServer=false
> > </snip>
> > 
> 
> Well, we already did that a few days ago and that's what made our three
> monitor configuration work 101% perfectly :)
> 
> 
> > > Gdm might be capable of starting the initial
> > > login sessions in the "right" order, but then two users logs in, the
> one
> > > with the card that must be loaded "first" then logs out and someone
> else
> > > logs in - restarting X on that card "last".
> > 
> > IIRC gdm follows the order in which the servers are specified 
> > in it's config file
> > on start : 1,2,3,.....
> > on shutdown : ...,3,2,1
> > 
> > IMO user logins/logouts doesn't metter 
> > 
> 
> As a matter of fact the logins/logouts do *NOT* matter. Once loaded they
> will reamin loaded untill the next reboot.
> 
> There is something really interesting here. When we log on with three
> monitors any user can logout and X won't shutdown (as we intended). 
> 
> However, with four monitors the order in gdm's session list is getting
> strange... 
> 
> Since this is not a simple problem I will try to simulate a little of
> what's going on here. Please try to understand this simulation:
> 
> => I try load gdm in an given order wich I configure in gdm.conf
>    (for example, let's imagine X0, X1, X2, X3 for our example).
> 
>    Now gdm is trying to bring X0 up.... SUCCESS!!
>    Now gdm is trying to bring X1 up.... SUCCESS!!
>    Now gdm is trying to bring X2 up.... FAILED.
>    But magically the X0 monitor _and_ X2 are frozen-up!!
>    Also X3 is not loaded, since we didn't get there.
> 
>    Now I do a "kill <gdm and his childs AND the X server>".
>    Now X0, X1, X2, X3 and the X server are dead.

what is the reason for the failers ?
for a year(maybe year and a half) i got only 1 time
problem to boot the bios of the card

if you have the same problem, i'd suggest to configure 
Xinerama as  James van Zeeland sugested, and run X -probeonly
with the Xinerama layout before starting gdm
Aivils the main developer of bruby and ruby,
is using such a setup with 3 Nvidia cards
 
one other thing, 
i don't really understand why should a failer in one server
block all previous ones
IMO on ruby if the system is running (i.e. not tottaly locked),
the other X server should still function properly

> => Now I edit my gdm.conf and try (X2, X0, X1, X3). Let's try it...
> 
>    Now gdm is trying to bring X2 up.... SUCCESS!!
>    Now gdm is trying to bring X0 up.... SUCCESS!!
>    Now gdm is trying to bring X1 up.... SUCCESS!!
>    Now gdm is trying to bring X3 up.... SUCCESS!!
>    Everything works now!! I am lucky!
>    Users may login and logout and everything works alright!!
> 
> => Now, I'm in heaven. I am kind of the hill... so now I am going to
> reboot and load everything again.
>
>
> => So now I edit gdm.conf and I left the default order of initialization
> to (X2, X0, X1, X3). Since it worked once it should work again, right??
> 
>    Now gdm is trying to bring X2 up.... FAILED.
>    And the machine is _completely_ halted... even my keyboard leds.

have you changed the primary card(the one initialized by BIOS)
to the one used by X2, IIRC with Miguels Solution
there is a big fat warning that a dumb(no VT/console) 
X server can not be the primary one 

> 
> I hope I illustrated my problem better. Please help if you know any kind
> of aid for this problem.

well, i'm afraid that i have no other ideas then 
initializing the cards via X -probeonly before starting gdm

maybe some more info on the X errors, X configs and the hardware used could
help us track it down 

> Just remembering, we have tried lots of different video cards and
> motherboards along with memories and processor... that's the definition
> of desperate!

i really doubt that hardware (except Graphic cards)
matters, so far it runs stable with a lot of PCI cards

what graphic cards are you using ?
have you checked the compatibility list ?

best,

svetljo

PS.
Aivils site seems to be down right now,
but there are some mirrors
US:
http://people.debian.org/~andreas/aivils/
Germany:
http://www.schuldei.org/aivils/
http://rfhs8012.fh-regensburg.de/~sls35340/aivils/
UK:
http://karlovo.demon.co.uk/~svetlio/aivils/

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