¿Como configuro una sesión remota con xinit y ssh?

En Debian, para acceder remotamente a otra máquina y obtener el entorno gráfico mediante el tunel ssh en mi máquina lo que hacía era arrancar el sistema de un modo normal, iniciar sesión con mi usuario y luego ir por ejemplo a tty1 con ctr+alt+F1.
Después ejecutaba el comando

xinit -- :1 vt12 

que me dejaba en tty12 una consola desde donde podía conectarme por ssh al ordenador remoto y ahí arrancar kdm para tener el entorno gráfico completo en mi máquina:

ssh -X nombreusuario@maquinaremota

Una vez conectado a la máquina remota por ssh, al ejecutar kdm ya estaba todo hecho.

En Mandriva 2010, he probado a poner en tty1 xinit -- :1 vt12 y no me arranca el servidor X, pero tampoco me da ningún error claro.
En el fichero /var/log/Xorg.1.log me da esta salida, sin que yo vea nada raro:

X.Org X Server 1.6.5
Release Date: 2009-10-11
X Protocol Version 11, Revision 0
Build Operating System: Linux_2.6.22.18-server-1mdv Mandriva
Current Operating System: Linux mikeltxo 2.6.31.5-desktop586-1mnb #1 SMP Fri Oct 23 00:21:26 EDT 2009 i686
Build Date: 13 October 2009 12:19:57PM

Before reporting problems, check http://qa.mandriva.com
to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.1.log", Time: Fri Nov 13 18:43:52 2009
(==) Using config file: "/etc/X11/xorg.conf"
(==) ServerLayout "layout1"
(**) |-->Screen "screen1" (0)
(**) | |-->Monitor "monitor1"
(**) | |-->Device "device1"
(**) Option "DontZap" "False"
(**) Option "AllowMouseOpenFail"
(==) Automatically adding devices
(==) Automatically enabling devices
(==) FontPath set to:
catalogue:/etc/X11/fontpath.d
(==) ModulePath set to "/usr/lib/xorg/extra-modules,/usr/lib/xorg/modules"
(II) Cannot locate a core pointer device.
(II) Cannot locate a core keyboard device.
(II) The server relies on HAL to provide the list of input devices.
If no devices become available, reconfigure HAL or disable AllowEmptyInput.
(II) Loader magic: 0x3bc0
(II) Module ABI versions:
X.Org ANSI C Emulation: 0.4
X.Org Video Driver: 5.0
X.Org XInput driver : 4.0
X.Org Server Extension : 2.0
(II) Loader running on linux
(++) using VT number 8

(--) PCI:*(0:1:0:0) 10de:0605:1043:829c nVidia Corporation G92 [GeForce 9800 GT] rev 162, Mem @ 0xc2000000/16777216, 0xb0000000/268435456, 0xc0000000/33554432, I/O @ 0x0000c000/128, BIOS @ 0x????????/131072
(II) Open ACPI successful (/var/run/acpid.socket)
(II) System resource ranges:
[0] -1 0 0xffffffff - 0xffffffff (0x1) MX[B]
[1] -1 0 0x000f0000 - 0x000fffff (0x10000) MX[B]
[2] -1 0 0x000c0000 - 0x000effff (0x30000) MX[B]
[3] -1 0 0x00000000 - 0x0009ffff (0xa0000) MX[B]
[4] -1 0 0x0000ffff - 0x0000ffff (0x1) IX[B]
[5] -1 0 0x00000000 - 0x00000000 (0x1) IX[B]
(WW) "dri" will not be loaded unless you've specified it to be loaded elsewhere.
(II) "extmod" will be loaded. This was enabled by default and also specified in the config file.
(II) "dbe" will be loaded. This was enabled by default and also specified in the config file.
(II) "glx" will be loaded. This was enabled by default and also specified in the config file.
(II) "record" will be loaded by default.
(II) "dri" will be loaded even though the default is to disable it.
(II) "dri2" will be loaded by default.
(II) LoadModule: "dbe"
(II) Loading /usr/lib/xorg/modules/extensions//libdbe.so
(II) Module dbe: vendor="X.Org Foundation"
compiled for 1.6.5, module version = 1.0.0
Module class: X.Org Server Extension
ABI class: X.Org Server Extension, version 2.0
(II) Loading extension DOUBLE-BUFFER
(II) LoadModule: "v4l"
(II) Loading /usr/lib/xorg/modules/drivers//v4l_drv.so
(II) Module v4l: vendor="X.Org Foundation"
compiled for 1.6.2, module version = 0.1.1
ABI class: X.Org Video Driver, version 5.0
(II) LoadModule: "extmod"
(II) Loading /usr/lib/xorg/modules/extensions//libextmod.so
(II) Module extmod: vendor="X.Org Foundation"
compiled for 1.6.5, module version = 1.0.0
Module class: X.Org Server Extension
ABI class: X.Org Server Extension, version 2.0
(II) Loading extension Multi-Buffering
(II) Loading extension MIT-SCREEN-SAVER
(II) Loading extension XFree86-VidModeExtension
(II) Loading extension XFree86-DGA
(II) Loading extension DPMS
(II) Loading extension XVideo
(II) Loading extension XVideo-MotionCompensation
(II) Loading extension X-Resource
(II) LoadModule: "glx"
(II) Loading /usr/lib/xorg/extra-modules//libglx.so
(II) Module glx: vendor="NVIDIA Corporation"
compiled for 4.0.2, module version = 1.0.0
Module class: X.Org Server Extension
(II) NVIDIA GLX Module 185.18.36 Fri Aug 14 17:50:12 PDT 2009
(II) Loading extension GLX
(II) LoadModule: "record"
(II) Loading /usr/lib/xorg/modules/extensions//librecord.so
(II) Module record: vendor="X.Org Foundation"
compiled for 1.6.5, module version = 1.13.0
Module class: X.Org Server Extension
ABI class: X.Org Server Extension, version 2.0
(II) Loading extension RECORD
(II) LoadModule: "dri2"
(II) Loading /usr/lib/xorg/modules/extensions//libdri2.so
(II) Module dri2: vendor="X.Org Foundation"
compiled for 1.6.5, module version = 1.1.0
ABI class: X.Org Server Extension, version 2.0
(II) Loading extension DRI2
(II) LoadModule: "nvidia"
(II) Loading /usr/lib/xorg/extra-modules//nvidia_drv.so
(II) Module nvidia: vendor="NVIDIA Corporation"
compiled for 4.0.2, module version = 1.0.0
Module class: X.Org Video Driver
(II) v4l driver for Video4Linux
(II) NVIDIA dlloader X Driver 185.18.36 Fri Aug 14 17:24:40 PDT 2009
(II) NVIDIA Unified Driver for all Supported NVIDIA GPUs
(II) Primary Device is: PCI 01@00:00:0
(WW) Falling back to old probe method for v4l
(II) Loading sub module "fb"
(II) LoadModule: "fb"
(II) Loading /usr/lib/xorg/modules//libfb.so
(II) Module fb: vendor="X.Org Foundation"
compiled for 1.6.5, module version = 1.0.0
ABI class: X.Org ANSI C Emulation, version 0.4
(II) Loading sub module "wfb"
(II) LoadModule: "wfb"
(II) Loading /usr/lib/xorg/modules//libwfb.so
(II) Module wfb: vendor="X.Org Foundation"
compiled for 1.6.5, module version = 1.0.0
ABI class: X.Org ANSI C Emulation, version 0.4
(II) Loading sub module "ramdac"
(II) LoadModule: "ramdac"
(II) Module "ramdac" already built-in
(II) resource ranges after probing:
[0] -1 0 0xffffffff - 0xffffffff (0x1) MX[B]
[1] -1 0 0x000f0000 - 0x000fffff (0x10000) MX[B]
[2] -1 0 0x000c0000 - 0x000effff (0x30000) MX[B]
[3] -1 0 0x00000000 - 0x0009ffff (0xa0000) MX[B]
[4] -1 0 0x0000ffff - 0x0000ffff (0x1) IX[B]
[5] -1 0 0x00000000 - 0x00000000 (0x1) IX[B]
(**) NVIDIA(0): Depth 24, (--) framebuffer bpp 32
(==) NVIDIA(0): RGB weight 888
(==) NVIDIA(0): Default visual is TrueColor
(==) NVIDIA(0): Using gamma correction (1.0, 1.0, 1.0)
(**) NVIDIA(0): Option "AddARGBGLXVisuals"
(**) NVIDIA(0): Option "DynamicTwinView" "false"
(**) NVIDIA(0): Enabling RENDER acceleration
(II) NVIDIA(0): Support for GLX with the Damage and Composite X extensions is
(II) NVIDIA(0): enabled.
(II) NVIDIA(0): NVIDIA GPU GeForce 9800 GT (G92) at PCI:1:0:0 (GPU-0)
(--) NVIDIA(0): Memory: 524288 kBytes
(--) NVIDIA(0): VideoBIOS: 62.92.3b.00.00
(II) NVIDIA(0): Detected PCI Express Link width: 16X
(--) NVIDIA(0): Interlaced video modes are supported on this GPU
(--) NVIDIA(0): Connected display device(s) on GeForce 9800 GT at PCI:1:0:0:
(--) NVIDIA(0): HP w19b/w19e (CRT-0)
(--) NVIDIA(0): HP w19b/w19e (CRT-0): 400.0 MHz maximum pixel clock
(II) NVIDIA(0): Assigned Display Device: CRT-0
(WW) NVIDIA(0): No valid modes for "1280x800"; removing.
(II) NVIDIA(0): Validated modes:
(II) NVIDIA(0): "1440x900"
(II) NVIDIA(0): Virtual screen size determined to be 1440 x 900
(--) NVIDIA(0): DPI set to (91, 91); computed from "UseEdidDpi" X config
(--) NVIDIA(0): option
(**) NVIDIA(0): Enabling 32-bit ARGB GLX visuals.
(--) Depth 24 pixmap format is 32 bpp
(II) do I need RAC? No, I don't.
(II) resource ranges after preInit:
[0] -1 0 0xffffffff - 0xffffffff (0x1) MX[B]
[1] -1 0 0x000f0000 - 0x000fffff (0x10000) MX[B]
[2] -1 0 0x000c0000 - 0x000effff (0x30000) MX[B]
[3] -1 0 0x00000000 - 0x0009ffff (0xa0000) MX[B]
[4] -1 0 0x0000ffff - 0x0000ffff (0x1) IX[B]
[5] -1 0 0x00000000 - 0x00000000 (0x1) IX[B]
(II) NVIDIA(0): Initialized GPU GART.
(II) NVIDIA(0): Setting mode "1440x900"
(II) Loading extension NV-GLX
(II) NVIDIA(0): NVIDIA 3D Acceleration Architecture Initialized
(==) NVIDIA(0): Disabling shared memory pixmaps
(II) NVIDIA(0): Using the NVIDIA 2D acceleration architecture
(==) NVIDIA(0): Backing store disabled
(==) NVIDIA(0): Silken mouse enabled
(**) NVIDIA(0): DPMS enabled
(II) Loading extension NV-CONTROL
(II) Loading extension XINERAMA
(==) RandR enabled
(II) Initializing built-in extension Generic Event Extension
(II) Initializing built-in extension SHAPE
(II) Initializing built-in extension MIT-SHM
(II) Initializing built-in extension XInputExtension
(II) Initializing built-in extension XTEST
(II) Initializing built-in extension BIG-REQUESTS
(II) Initializing built-in extension SYNC
(II) Initializing built-in extension XKEYBOARD
(II) Initializing built-in extension XC-MISC
(II) Initializing built-in extension SECURITY
(II) Initializing built-in extension XINERAMA
(II) Initializing built-in extension XFIXES
(II) Initializing built-in extension XFree86-Bigfont
(II) Initializing built-in extension RENDER
(II) Initializing built-in extension RANDR
(II) Initializing built-in extension COMPOSITE
(II) Initializing built-in extension DAMAGE
(II) Initializing extension GLX
(II) config/hal: Adding input device X10 WTI RF receiver
(II) LoadModule: "evdev"
(II) Loading /usr/lib/xorg/modules/input//evdev_drv.so
(II) Module evdev: vendor="X.Org Foundation"
compiled for 1.6.3, module version = 2.2.5
Module class: X.Org XInput Driver
ABI class: X.Org XInput driver, version 4.0
(**) X10 WTI RF receiver: always reports core events
(**) X10 WTI RF receiver: Device: "/dev/input/event7"
(II) X10 WTI RF receiver: Found 9 mouse buttons
(II) X10 WTI RF receiver: Found x and y relative axes
(II) X10 WTI RF receiver: Found keys
(II) X10 WTI RF receiver: Configuring as mouse
(II) X10 WTI RF receiver: Configuring as keyboard
(**) X10 WTI RF receiver: YAxisMapping: buttons 4 and 5
(**) X10 WTI RF receiver: EmulateWheelButton: 4, EmulateWheelInertia: 10, EmulateWheelTimeout: 200
(II) XINPUT: Adding extended input device "X10 WTI RF receiver" (type: KEYBOARD)
(**) Option "xkb_rules" "evdev"
(**) Option "xkb_model" "pc105"
(**) Option "xkb_layout" "es"
(**) Option "xkb_options" "compose:rwin"
(**) X10 WTI RF receiver: (accel) keeping acceleration scheme 1
(**) X10 WTI RF receiver: (accel) filter chain progression: 2.00
(**) X10 WTI RF receiver: (accel) filter stage 0: 20.00 ms
(**) X10 WTI RF receiver: (accel) set acceleration profile 0
(II) X10 WTI RF receiver: initialized for relative axes.
(II) config/hal: Adding input device BTC USB Multimedia Keyboard
(**) BTC USB Multimedia Keyboard: always reports core events
(**) BTC USB Multimedia Keyboard: Device: "/dev/input/event2"
(II) BTC USB Multimedia Keyboard: Found keys
(II) BTC USB Multimedia Keyboard: Configuring as keyboard
(II) XINPUT: Adding extended input device "BTC USB Multimedia Keyboard" (type: KEYBOARD)
(**) Option "xkb_rules" "evdev"
(**) Option "xkb_model" "pc105"
(**) Option "xkb_layout" "es"
(**) Option "xkb_options" "compose:rwin"
(II) config/hal: Adding input device BTC USB Multimedia Keyboard
(**) BTC USB Multimedia Keyboard: always reports core events
(**) BTC USB Multimedia Keyboard: Device: "/dev/input/event1"
(II) BTC USB Multimedia Keyboard: Found keys
(II) BTC USB Multimedia Keyboard: Configuring as keyboard
(II) XINPUT: Adding extended input device "BTC USB Multimedia Keyboard" (type: KEYBOARD)
(**) Option "xkb_rules" "evdev"
(**) Option "xkb_model" "pc105"
(**) Option "xkb_layout" "es"
(**) Option "xkb_options" "compose:rwin"
(II) config/hal: Adding input device Sleep Button
(**) Sleep Button: always reports core events
(**) Sleep Button: Device: "/dev/input/event5"
(II) Sleep Button: Found keys
(II) Sleep Button: Configuring as keyboard
(II) XINPUT: Adding extended input device "Sleep Button" (type: KEYBOARD)
(**) Option "xkb_rules" "evdev"
(**) Option "xkb_model" "pc105"
(**) Option "xkb_layout" "es"
(**) Option "xkb_options" "compose:rwin"
(II) config/hal: Adding input device Power Button
(**) Power Button: always reports core events
(**) Power Button: Device: "/dev/input/event4"
(II) Power Button: Found keys
(II) Power Button: Configuring as keyboard
(II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD)
(**) Option "xkb_rules" "evdev"
(**) Option "xkb_model" "pc105"
(**) Option "xkb_layout" "es"
(**) Option "xkb_options" "compose:rwin"
(II) config/hal: Adding input device Power Button
(**) Power Button: always reports core events
(**) Power Button: Device: "/dev/input/event3"
(II) Power Button: Found keys
(II) Power Button: Configuring as keyboard
(II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD)
(**) Option "xkb_rules" "evdev"
(**) Option "xkb_model" "pc105"
(**) Option "xkb_layout" "es"
(**) Option "xkb_options" "compose:rwin"
(II) config/hal: Adding input device Logitech Optical USB Mouse
(**) Logitech Optical USB Mouse: always reports core events
(**) Logitech Optical USB Mouse: Device: "/dev/input/event0"
(II) Logitech Optical USB Mouse: Found 3 mouse buttons
(II) Logitech Optical USB Mouse: Found x and y relative axes
(II) Logitech Optical USB Mouse: Found scroll wheel(s)
(II) Logitech Optical USB Mouse: Configuring as mouse
(**) Logitech Optical USB Mouse: YAxisMapping: buttons 4 and 5
(**) Logitech Optical USB Mouse: EmulateWheelButton: 4, EmulateWheelInertia: 10, EmulateWheelTimeout: 200
(II) XINPUT: Adding extended input device "Logitech Optical USB Mouse" (type: MOUSE)
(**) Logitech Optical USB Mouse: (accel) keeping acceleration scheme 1
(**) Logitech Optical USB Mouse: (accel) filter chain progression: 2.00
(**) Logitech Optical USB Mouse: (accel) filter stage 0: 20.00 ms
(**) Logitech Optical USB Mouse: (accel) set acceleration profile 0
(II) Logitech Optical USB Mouse: initialized for relative axes.
(II) X10 WTI RF receiver: Close
(II) UnloadModule: "evdev"
(II) BTC USB Multimedia Keyboard: Close
(II) UnloadModule: "evdev"
(II) BTC USB Multimedia Keyboard: Close
(II) UnloadModule: "evdev"
(II) Sleep Button: Close
(II) UnloadModule: "evdev"
(II) Power Button: Close
(II) UnloadModule: "evdev"
(II) Power Button: Close
(II) UnloadModule: "evdev"
(II) Logitech Optical USB Mouse: Close
(II) UnloadModule: "evdev"

¿Se os ocurre qué está pasando?