Re: [gdm-list] Multi-seat and multi-display support design

[Ray Strode <halfline gmail com>]

Hi,
> On Tue, 2009-03-10 at 10:14 -0400, Ray Strode wrote:
>> So, one thing X development has been trying to do over the last few
>> years is get rid of the need for xorg.conf.  The keyboard and mouse
>> sections are all evdev these days.
>>
>> I think we need consolekit to associate a usb hub, keyboard, mouse,
>> etc with the session independently from xorg.conf.  That's the only
>> way you're going to get sane behavior with hot plugged devices
> Ray,
>
> Could you give a example for Xorg command with specify KPVS?
I don't think there's an out of the box way to do this yet.  It's
going to need some changes.

Right now X asks HAL about what keyboards and mice are on the system,
and HAL tells it which driver to load (where the driver is normally
always "evdev").

HAL tells X any time a new keyboard or mouse gets plugged in.  If
there are multiple X servers running on the different VTs, only the X
server on the active vt will have the input devices open.  When you
switch VTs the old vt's X server closes its device fds and the new
vt's X server opens them.

In a multiseat world, we want the X server for a given seat to only
open the devices that belong to that seat.  ConsoleKit is the registry
of seat information, so the X server may need to be changed to query
ConsoleKit.

--Ray