Multiseat with Nvidia and X11R6.9

[cyrusthevirus]

Hello!
I'm working on a multiseat configuration.
I tested it with a 256kb Sis card, and it worked fine (even if the 2nd
seat was an ugly 640x480, 16 colors).
So I bought on eBay a brand-new Nvidia GeForce FX 5200 PCI, and now I'm
having problems (yes, the 5200 alone works smoothly!).

My lspci now reports these cards:
01:00.0 VGA compatible controller: nVidia Corporation GeForce 7300 GS
(rev a1)
05:01.0 VGA compatible controller: nVidia Corporation NV34 [GeForce FX
5200] (rev a1)
and both are reported by nvidia-settings.

On 7300 there are two LCDs, on 5200 a single one.

I'm still running X11R6.9 while waiting for the official packages of the
7.1.

The /etc/xorg.cfg (essential parts) is

# Modules ##################################

Section "Module"
	Load	"dbe"
	SubSection  "extmod"
		Option    "omit xfree86-dga"
	EndSubSection
	Load	"type1"
	Load	"freetype"
	Load	"glx"
EndSection

# Monitors #################################

Section "Monitor"
	Identifier		"MDual"
	HorizSync		9.0 - 79.0
	VertRefresh		60.0 - 75.0
	Option			"DPMS"
EndSection

Section "Monitor"
	Identifier		"MSingle"
	HorizSync		9.0 - 79.0
	VertRefresh		60.0 - 75.0
	Option			"DPMS"
EndSection

# Graphics devices #######################

Section "Device"
	Identifier	"VGASingle"
	Driver		"nvidia"
	BusID		"PCI:5:1:0"
EndSection

Section "Device"
	Identifier	"VGADual"
	Driver		"nvidia"
	BusID		"PCI:1:0:0"
EndSection

# Screen sections ######################

Section "Screen"
	Identifier		"ScreenSingle"
	Device			"VGASingle"
	Monitor			"MSingle"
	DefaultDepth	24
	SubSection "Display"
		Depth	24
		Modes	"1280x1024"
	EndSubSection
EndSection

Section "Screen"
	Identifier		"ScreenDual"
	Device			"VGADual"
	Monitor			"MDual"
	DefaultDepth	24
	Subsection "Display"
		Option	"TwinView" "1"
		Option	"metamodes" "CRT: 1280x1024 +0+0, DFP: nvidia-auto-select +1280+0"
		Virtual 2560 1024
		Viewport 1280 0
		Depth	24
		Modes	"1280x1024"
		ViewPort	0 0
	EndSubsection
EndSection

# ServerLayouts ######################

Section "ServerLayout"
	Identifier "one"
	Screen "ScreenSingle"
	InputDevice "Mouse1" "CorePointer"
	InputDevice "Keyboard1" "CoreKeyboard"
EndSection

Section "ServerLayout"
	Identifier "two"
	Screen "ScreenDual"
	InputDevice "Mouse2"
	InputDevice "Keyboard2"
EndSection

To start the system in runlevel 4 I use kdm with the following
/opt/kde/share/config/kdm/kdmrc (essentials):

[General]
ConsoleTTYs=tty1,tty2,tty3,tty4,tty5,tty6
ReserveServers=:2,:3
ServerVTs=-7,-8
StaticServers=:0, :1

[X-:0-Core]
ServerCmd=/usr/X11R6/bin/X -layout one
ServerVT=7

[X-:1-Core]
ServerCmd=/usr/X11R7/bin/X -layout two
ServerVT=7

So, what is wrong with the new Nvidia?
And why, if I revert to a text console, I have characters the size of
those of the VIC-20 (40 in a line)?

Thanks for the support!

-- 
I love to be mailed just by smart people:
perl -we '$@="\145\143\150\157\40\42\142\145\162\156\141".
     "\155\141\100\151\164\167\145\142\56\151\164\42\40\76".
     "\40\57\144\145\166\57\164\164\171";`$@`'