Re: multiple gdm

Thanks guys for the info. Very useful to know these details.
Cheers. Steve.

On Thu, 2015-01-15 at 10:32 -0800, Giovanni Campagna wrote:

On Thu, Jan 15, 2015 at 10:08 AM, Stephen Adler
<adler stephenadler com> wrote:
        Thanks, just to be clear, I don't want one gnome session
        running on two
        X servers. I want to run two different instances of gnome,
        each with its
        own X server. The idea would be, if all is working, when I
        boot my
        system, I'll get two gdm login screens, one for each monitor.
        I could
        then have to log in twice, perhaps under different user names.
        It may
        sound like a bad hack, but I'm just wondering if somehow I
        configure gdm to work of some specified display, like :0.0
        or :0.1 or
        something like that.

:0.0 and :0.1 refer to different screens (GPUs / root windows) under
one X server, which is not supported. What I understand you want is :0
and :1, ie, two completely separate X servers. The easiest way to
obtain that is to tag the different GPUs and input devices in
different seats in udev rules - then GDM will automatically start an X
server on each seat and you'll be able to login.
Note that you must have two sets of input devices and two separate
GPUs, because each server will take full control of one.

The details for how to configure multiseat are

        On Thu, 2015-01-15 at 09:45 -0800, Jasper St. Pierre wrote:
        > GNOME does not support multiple X11 screens. My
        understanding is that
        > recent versions of nvidia proprietary added XRandR as a
        feature, which
        > is what we require for multi monitor support.
        > On Jan 15, 2015 6:31 AM, "Stephen Adler"
        <adler stephenadler com>
        > wrote:
        >         Guys,
        >         I'm not sure if this is the right mailing list to
        ask this
        >         question so
        >         forgive if I miss-posted...
        >         I have a system with two video cards, quadro K2200
        and a K620
        >         and the
        >         nvidia propriatary driver will not configure a
        single desktop
        >         (X server)
        >         using both cards. It will configure two separate X
        servers or
        >         X
        >         displays, one for each card. So I thought maybe I
        could run
        >         two versions
        >         of gdm, one for each X server or X display (I'm not
        sure the
        >         terminology
        >         here.) :0.0 and :0.1 would be the -display syntax to
        use. This
        >         way I
        >         could have two separate sessions a bit like a KVM
        >         expect I'd have
        >         two monitors with one keyboard and mouse, and I
        would move my
        >         mouse over
        >         from one monitor to another to switch from one gnome
        >         to another.
        >         so... how would I configure gdm to run on two X
        displays or
        >         servers?
        >         Thanks!
        >         Steve.
        >         _______________________________________________
        >         desktop-devel-list mailing list
        >         desktop-devel-list gnome org
        desktop-devel-list mailing list
        desktop-devel-list gnome org

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