Problem with Multiseat-X on Ubuntu Jaunty / Xorg 1.6 + evdev

Tomasz Chmielewski mangoo at
Sat Jul 18 04:19:53 PDT 2009

Wolfgang Klein wrote:
> Hello,
> I subscribed to this list because I am facing a problem that could be
> related to Xorg.
> Until now I'm running a nice little multiseat machine (on pc, two users)
> with Ubuntu Hardy. Now I would like to upgrade that system to Ubuntu
> Jaunty, but the problem is this: xorg seems to ignore the
> 	Option      "AutoAddDevices"        "false"
> in xorg.conf when I start the multiseat on Jaunty. There are 2 USB mice,
> 1 USB keyboard and 1 PS/2 keyboard attached to my machine and I use the
> above option to tell Xorg not to use HAL. Instead the appropriate
> devices each have a
> 	Section "InputDevice"
> in xorg.conf and each device is assigned to a seat the classic way:
> Section "ServerLayout"
>     Identifier  "seat_1"
>     Screen      0 "screen_seat_1" 0 0
>     InputDevice "simple_kbd_seat_1"
>     InputDevice "mouse_seat_1"
>     Option      "SingleCard"
>      Option     "AllowEmptyInput"       "false"
>     Option      "AutoAddDevices"        "false"
> EndSection
> This solution works perfectly in Hardy, but not any more in Jaunty:
> typing on the USB keyboard is now visible on both seats, while typing on
> the PS/2 keyboard still only can be seen on the seat it is meant for.
> The two mice still work independently.
> Is there any other / new option in Jaunty's version of Xorg that I
> haven't found yet that has to be set? Did I stumble over a bug?
> Did anyone manage to build a multiseat machine using Jaunty? If so: what
> options did you use to keep the input devices separated?
> Many thanks in advance for any help.

Have you looked at /var/log/Xorg* logs?

It might give you some clues on why the:

Section "ServerFlags"
     Option "AutoAddDevices" "false" 


is ignored (or perhaps, there is some other issue here).

Tomasz Chmielewski

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