Re: [gdm-list] Future of GDM & ConsoleKit

[duportail <poort telenet be>]

Op 19-5-2011 3:58, Brian Cameron schreef:
> I notice on the FreeDesktop ConsoleKit mailing list that Lennart
> Poettering recently suggested that ConsoleKit is going away and
> being replaced with systemd on some Linux distros.[1]
>
> I am interested to discuss how GDM can continue to support systems
> without systemd.  As Lennart mentions, part of the reason for migrating
> to systemd is to better support multi-seat features with device
> management.  I worked on a project to also add multi-seat support to
> ConsoleKit.[2]  As mentioned in comment #27 of bug #536355[3], it seems
> the main reason this work has not yet been accepted upstream was
> because this design lacks device management features.  Unfortunately,
> the developers at Oracle have not yet been able to implement Linux
> device management features into this work.
>
> When Simon Zheng, Halton Huo, and myself designed these interfaces, the
> intent was that they could be extended to support device management.  I
> am sure that the "Devices" line in the design for
> /etc/ConsoleKit/seat.d is too primitive and needs work.  But it seems a
> starting point to discuss.
>
> For the sake of discussion, can we explore the idea of continuing to
> support ConsoleKit interfaces?  If this is not possible, then it would
> be interesting to know why.  Could ConsoleKit and a systemd-based
> solution share a common (or extended) D-Bus API?  Or is there something
> very fundamental about the two designs that is just incompatible?
>
> If Linux moves away from using ConsoleKit in favor of systemd in GDM,
> then would it be reasonable for GDM on systems that do not have systemd
> to just continue to use ConsoleKit?
>
> It seems that GDM could support two backends for supporting multi-seat.
> One based on systemd and another based on this ConsoleKit work.  I
> realize this ConsoleKit-based approach does not yet support device
> management as well as the systemd proposal, but it is better than GDM
> not working on systems that do not have systemd at all, I should think.
>
> Brian
>
> [1] http://lists.freedesktop.org/archives/consolekit/2011-May/000136.html
> [2] 
> http://wiki.genunix.org/wiki/index.php/design_for_newgdm_consolekit_multiseat_multidisplay
> or
> https://bugzilla.gnome.org/show_bug.cgi?id=536355#c27
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Be sure that gdm multiseat needs to offer multiseat for multihead vga 
cards such as gdm 2.20 did:starting on :0 , non-handled mainserver and 
than the per display xserver such as :0.1 and :0.2 and so on.Because I 
do not think Nvidia will ever get multiseat into their drivers.
The gdm 2.30 multiseat patches only support one seat per vga card.
MS multipoint server offers multiseat on dual-head cards:one seat per head.