xorg 7.6, nvidia multiseat completely broken?

[Ditmar Unger]

Hello,

things are getting worse than ever. Until OpenSuSE 12.1 I had a working 
dualseat configuration with separated mice and keyboards for years. Now, with 
SuSE 12.2, xorg 7.6, two nvidia cards (610GT and 430GT) and the newest driver 
nvidia-computeG02-304.64-22.1.x86_64 I cannot even start two x Servers any 
more, no matter if I use one xorg.conf as shown below or two 
xorg.conf.seat[1,2] as recommended in http://wiki.gentoo.org/wiki/Multiseat  
because when the display cable is connected to the second seat the X-Server 
now just crashes and the computer needs a reboot.

The error messages in /var/log/Xorg.0.log says:
	NVIDIA(GPU-1): Failed to allocate EVO core DMA push buffer
	Caught signal 11 (Segmentation fault). Server aborting

and if you google this, you find in  
http://www.nvnews.net/vbulletin/showthread.php?t=185042
nvidia saying "Multiseat configurations are not supported, I'm afraid. Sorry."
This is incredible, who the hell does such stupid things and: why?

So after frustrating hours of playing with different graphic cards and 
configurations all I know is that I should never have updated the working 
configuration; the rest is nothing but bull shit.

Now, for the very last chance before giving up with multiseat on Linux - are 
there any hints of wise old Scandinavian men left?

Thanks,
Ditmar.

--
Ditmar,


as you use recent version of xorg and most probably recent udev version, it is 
recommanded that you setup a hotplugged based setup.
please refer to this tutorial: http://wiki.gentoo.org/wiki/Multiseat


this will most probably solve all your issues.
 
An wise Scandinavian old man once said: "in the end, everything is going to be 
alright"

From: Ditmar Unger <ditmar at d-unger.de>
To: xorg at lists.x.org 
Sent: Saturday, October 13, 2012 6:39 PM
Subject: xorg 7.6, 2-seat environment, no mice


Hello,

I've upgraded from OpenSuSE 12.1 to 12.2 with xorg 7.6 in a 2-seat environment 
and cannot separate mice any more.
Different to the situation before the upgrade I cannot switch off

Section "ServerLayout"
    Option        "AutoEnableDevices" "on"
    Option        "AutoAddDevices" "on"

without switching off both mice. Switching it ON leads to the input off 
both keyb. and mice on both screens which makes the multiseat environment  
unusable.

Switching it OFF leads to Xorg.[0,1].log

config/udev: Adding input device Logitech USB Receiver (/dev/input/event0)
AutoAddDevices is off - not adding device.

although the keyboards DO work

and 
config/udev: Adding input device Logitech Logitech BT Mini-Receiver 
(/dev/input/mouse1)
AutoAddDevices is off - not adding device.

and both mice are dead.

Any help would be greatly appreciated.

Thanks in advance,
Ditmar.


Here are the relevant sections of xorg.conf (keyboards use evdev):

Section "InputDevice"
  # Maus Logitech EX 110
  # *******************
  Driver      "mouse"
  Identifier  "Mouse_Logitech_EX110"
#  Option      "Device" "/dev/input/by-path/pci-0000:00:1d.0-usb-0:1.5:1.1-
mouse"
  Option      "Device" "/dev/input/mouse0"
  Option      "Buttons" "12"
  Option      "Name" "ImExPS/2 Logitech Explorer Mouse"
  Option      "Protocol" "explorerps/2"
  Option      "Vendor" "Sysp"
  Option      "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
  # Maus Logitech DiNovo mini
  # *************************
  Identifier  "Mouse_Logitech_DiNovomini"
  Driver      "mouse"
#  Option      "Device" "/dev/input/by-path/pci-0000:00:1d.0-usb-0:1.6.3:1.0-
mouse"
  Option      "Device" "/dev/input/mouse1"
  Option      "Buttons" "12"
  Option      "Name" "Logitech BT Mini-Receiver"
  Option      "Protocol" "explorerps/2"
  Option      "Vendor" "Sysp"
  Option      "ZAxisMapping" "4 5"
EndSection

Section "ServerLayout"
  Identifier  "Layout[TFT]"
  InputDevice  "Keyboard_Logitech_EX110" "CoreKeyboard"
  InputDevice  "Mouse_Logitech_EX110" "CorePointer"
  Option      "Clone" "off"
  Option      "Xinerama" "off"
  Screen      "Screen_TFT"
  Option        "AllowEmptyInput" "off"
  Option        "AutoAddDevices" "on"
#  Option      "AutoAddDevices" "off"
  Option        "AutoEnableDevices" "on"
#  Option      "AutoEnableDevices" "off"
  Option        "IsolateDevice" "PCI:0:2:0"
EndSection

Section "ServerLayout"
  Identifier  "Layout[Beamer]"
  InputDevice  "Keyboard_Logitech_DiNovomini" "CoreKeyboard"
  InputDevice  "Mouse_Logitech_DiNovomini" "CorePointer"
  Option      "Clone" "off"
  Option      "Xinerama" "off"
  Screen      "Screen_BEAMER"
  Option        "AllowEmptyInput" "off"
  Option        "AutoAddDevices" "on"
#  Option      "AutoAddDevices" "off"
  Option        "AutoEnableDevices" "on"
#  Option      "AutoEnableDevices" "off"
  Option      "IsolateDevice" "PCI:1:0:0"
EndSection

kdmrc uses:
^^^^^^^^
[X-:*-Core]
ServerArgsLocal=-nolisten tcp -layout Layout[TFT]

[X-:0-Core]
ServerCmd=/usr/bin/X0 -br

[X-:1-Core]
ServerArgsLocal=-nolisten tcp -layout Layout[Beamer] -sharevts -novtswitch
ServerCmd=/usr/bin/X1 -br vt8
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