Re: [gdm-list] gdm-list Digest, Vol 102, Issue 1

["John D. Hendrickson and Sara Darnell" <johnandsara2 cox net>]

i am not the gdm3 maintainer.  however gdm-list-request already has 
the multi-head question asked many times.  see history.

GNOME I get ":0" instead of ":0.0"

you will have to see source.  because you get a string ":0" does not 
mean ":0.0" cannot be used to refer to the same, though xauth might be 
able to filter that way in a pinch.

do you really want one gdm3 on all?  run one on each?  else you are 
tying one big display, want one greeting, that's an issue of tell the 
window manager not of remote greetings

those are just ideas.  there are many other answers in history i assume


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> Today's Topics:
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>    1.  GDM3 starts gnome seession only on one X Screen of two
>       (??????? ????????)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 23 Jan 2014 19:56:23 +0400
> From: ??????? ???????? <krokoziabla gmail com>
> To: gdm-list gnome org
> Subject: [gdm-list] GDM3 starts gnome seession only on one X Screen of
>         two
> Message-ID:
>         <CAJXE3P6Pdc_CLHoQL+7GVYUvdGZQpOsfKZ-esAJReoNFps84HA mail gmail com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hello, list.
>
> I have a multi-head environment:
>
> *Code:*
> Section "ServerLayout"
>     Identifier          "Default"
>     Screen              "Left" 0 0
>     Screen              "CentreAndRight" RightOf "Left"
> EndSection
>
>
>
> Section "Screen"
>     Identifier          "CentreAndRight"
>     Device              "hd6850"
> EndSection
>
> Section "Screen"
>     Identifier          "Left"
>     Device              "hd2000"
> EndSection
>
>
>
> Section "Device"
>     Identifier          "hd6850"
>     Driver              "radeon"
>     BusID               "PCI:1:0:0"
> EndSection
>
> Section "Device"
>     Identifier          "hd2000"
>     Driver              "intel"
>     BusID               "PCI:0:2:0"
> EndSection
>
>
> As you can see I define two "Screen" sections since I have two video cards.
> The problem is that GDM3 starts GNOME session only on the first met Screen
> of the layout (I tried to swap them and the session was started on the
> other Screen).
>
> Xorg.0.log says that there is no problem with any Screen. And indeed after
> I log in, the mouse pointer moves between one monitor with GNOME on it and
> two other black monitors. And for instance xrandr tool tells that there are
> indeed two screens and the monitors are identified correctly. So this makes
> me think that there's no problem with Xorg server but it is GDM3 which
> doesn't behave properly. Another strange thing is that if I want to get the
> value of DISPLAY variable on the Screen with GNOME I get ":0" instead of
> ":0.0". GDM logs also confirm that it is GDM who sets this value.
>
> One more word about GDM2. Before upgrade to GNOME 3 I had no problem with
> GDM and could use all the three monitors simultaneously with the same
> xorg.conf So does GDM3 need to be configured differently?
>
> BTW, I have default settings for GDM3. OS is Gentoo.
>
> I would be glad too to get a link to some really good and descriptive
> documents about GDM and X because the official ones seem to be very scanty
> and mostly low-level.
>
> BR, Vitaly Kirsanov
> skype: vkirsan
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