Probando OpenMandriva: no me funciona el driver NVIDIA y veo dos repos casi iguales

Estos días tenía previsto actualizar Mageia 4 a Mageia 5, pero he decidido aprovechar para instalar OpenMandriva y así poder comparar ambas distros. Pues bien, he instalado OpenMandriva 2014.2 y resulta que no me funciona el driver privativo de NVIDIA (v. 340), que en Mageia 4 me funcionaba a la perfección (hasta la v. 331, que fue la última publicada).

Pego aquí el contenido de /var/log/Xorg.0.log:

[ 41.200]
X.Org X Server 1.15.2
Release Date: 2014-06-27
[ 41.200] X Protocol Version 11, Revision 0
[ 41.200] Build Operating System: Linux_3.13.0-36-generic mandriva
[ 41.200] Current Operating System: Linux localhost 4.1.3-nrjQL-desktop-3omv #1 SMP PREEMPT Sat Aug 1 10:23:00 UTC 2015 x86_64
[ 41.200] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.1.3-nrjQL-desktop-3omv root=UUID=670091fc-7157-44d3-b0c0-d0c0a6162919 ro quiet splash=silent logo.nologo acpi_osi=Linux video.use_native_backlight=1 audit=0 locale.lang=es_ES.UTF-8 vconsole.keymap=es-latin1 nokmsboot
[ 41.200] Build Date: 25 February 2015 03:55:35PM
[ 41.200]
[ 41.200] Current version of pixman: 0.32.4
[ 41.200] Before reporting problems, check https://issues.openmandriva.org/
to make sure that you have the latest version.
[ 41.200] Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 41.200] (==) Log file: "/var/log/Xorg.0.log", Time: Sun Aug 16 23:25:24 2015
[ 41.224] (==) Using config file: "/etc/X11/xorg.conf"
[ 41.224] (==) Using config directory: "/etc/X11/xorg.conf.d"
[ 41.224] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[ 41.230] (==) ServerLayout "layout1"
[ 41.230] (**) |-->Screen "screen1" (0)
[ 41.230] (**) | |-->Monitor "monitor1"
[ 41.231] (**) | |-->Device "device1"
[ 41.231] (**) Option "DontZap" "False"
[ 41.231] (**) Option "AllowMouseOpenFail"
[ 41.231] (==) Automatically adding devices
[ 41.231] (==) Automatically enabling devices
[ 41.231] (==) Automatically adding GPU devices
[ 41.231] (==) FontPath set to:
catalogue:/etc/X11/fontpath.d
[ 41.231] (==) ModulePath set to "/usr/lib64/xorg/extra-modules,/usr/lib64/xorg/modules"
[ 41.231] (II) The server relies on udev to provide the list of input devices.
If no devices become available, reconfigure udev or disable AutoAddDevices.
[ 41.244] (II) Loader magic: 0x63fc80
[ 41.244] (II) Module ABI versions:
[ 41.244] X.Org ANSI C Emulation: 0.4
[ 41.244] X.Org Video Driver: 15.0
[ 41.244] X.Org XInput driver : 20.0
[ 41.244] X.Org Server Extension : 8.0
[ 41.247] (--) PCI:*(0:1:0:0) 10de:0649:14c0:0031 rev 161, Mem @ 0xce000000/16777216, 0xd0000000/268435456, 0xcc000000/33554432, I/O @ 0x00002000/128
[ 41.247] (II) Open ACPI successful (/var/run/acpid.socket)
[ 41.247] Initializing built-in extension Generic Event Extension
[ 41.247] Initializing built-in extension SHAPE
[ 41.247] Initializing built-in extension MIT-SHM
[ 41.247] Initializing built-in extension XInputExtension
[ 41.247] Initializing built-in extension XTEST
[ 41.247] Initializing built-in extension BIG-REQUESTS
[ 41.247] Initializing built-in extension SYNC
[ 41.247] Initializing built-in extension XKEYBOARD
[ 41.247] Initializing built-in extension XC-MISC
[ 41.247] Initializing built-in extension SECURITY
[ 41.247] Initializing built-in extension XINERAMA
[ 41.247] Initializing built-in extension XFIXES
[ 41.247] Initializing built-in extension XFree86-Bigfont
[ 41.247] Initializing built-in extension RENDER
[ 41.247] Initializing built-in extension RANDR
[ 41.247] Initializing built-in extension COMPOSITE
[ 41.247] Initializing built-in extension DAMAGE
[ 41.247] Initializing built-in extension MIT-SCREEN-SAVER
[ 41.247] Initializing built-in extension DOUBLE-BUFFER
[ 41.247] Initializing built-in extension RECORD
[ 41.247] Initializing built-in extension DPMS
[ 41.247] Initializing built-in extension Present
[ 41.247] Initializing built-in extension DRI3
[ 41.247] Initializing built-in extension X-Resource
[ 41.247] Initializing built-in extension XVideo
[ 41.247] Initializing built-in extension XVideo-MotionCompensation
[ 41.247] Initializing built-in extension XFree86-VidModeExtension
[ 41.247] Initializing built-in extension XFree86-DGA
[ 41.247] Initializing built-in extension XFree86-DRI
[ 41.247] Initializing built-in extension DRI2
[ 41.247] (II) "glx" will be loaded by default.
[ 41.247] (II) LoadModule: "v4l"
[ 41.252] (II) Loading /usr/lib64/xorg/modules/drivers/v4l_drv.so
[ 41.260] (II) Module v4l: vendor="X.Org Foundation"
[ 41.260] compiled for 1.15.0, module version = 0.1.1
[ 41.260] ABI class: X.Org Video Driver, version 15.0
[ 41.260] (II) LoadModule: "glx"
[ 41.260] (II) Loading /usr/lib64/xorg/extra-modules/libglx.so
[ 42.686] (II) Module glx: vendor="NVIDIA Corporation"
[ 42.686] compiled for 4.0.2, module version = 1.0.0
[ 42.686] Module class: X.Org Server Extension
[ 42.692] (II) NVIDIA GLX Module 340.76 Thu Jan 22 11:24:42 PST 2015
[ 42.696] Loading extension GLX
[ 42.696] (II) LoadModule: "nvidia"
[ 42.696] (II) Loading /usr/lib64/xorg/extra-modules/nvidia_drv.so
[ 42.770] (II) Module nvidia: vendor="NVIDIA Corporation"
[ 42.770] compiled for 4.0.2, module version = 1.0.0
[ 42.770] Module class: X.Org Video Driver
[ 42.779] (II) v4l driver for Video4Linux
[ 42.779] (II) NVIDIA dlloader X Driver 340.76 Thu Jan 22 11:03:05 PST 2015
[ 42.779] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs
[ 42.780] (++) using VT number 2
[ 42.893] (WW) Falling back to old probe method for v4l
[ 42.905] (II) Loading sub module "fb"
[ 42.905] (II) LoadModule: "fb"
[ 42.905] (II) Loading /usr/lib64/xorg/modules/libfb.so
[ 42.914] (II) Module fb: vendor="X.Org Foundation"
[ 42.914] compiled for 1.15.2, module version = 1.0.0
[ 42.914] ABI class: X.Org ANSI C Emulation, version 0.4
[ 42.914] (WW) Unresolved symbol: fbGetGCPrivateKey
[ 42.914] (II) Loading sub module "wfb"
[ 42.914] (II) LoadModule: "wfb"
[ 42.919] (II) Loading /usr/lib64/xorg/modules/libwfb.so
[ 42.930] (II) Module wfb: vendor="X.Org Foundation"
[ 42.930] compiled for 1.15.2, module version = 1.0.0
[ 42.930] ABI class: X.Org ANSI C Emulation, version 0.4
[ 42.930] (II) Loading sub module "ramdac"
[ 42.930] (II) LoadModule: "ramdac"
[ 42.930] (II) Module "ramdac" already built-in
[ 42.954] (EE) NVIDIA: Failed to initialize the NVIDIA kernel module. Please see the
[ 42.954] (EE) NVIDIA: system's kernel log for additional error messages and
[ 42.954] (EE) NVIDIA: consult the NVIDIA README for details.
[ 42.954] (EE) No devices detected.
[ 42.954] (EE)
Fatal server error:
[ 42.954] (EE) no screens found(EE)
[ 42.954] (EE)
Please consult the The X.Org Foundation support
at https://issues.openmandriva.org/
for help.
[ 42.954] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[ 42.954] (EE)

¿Alguien sabe algo?

Por cierto, otra cosa que me ha sorprendido es que en el listado de repos oficiales aparecen dos de nombre casi idéntico: "Main32 Updates" y "Main32Updates":

$ urpmq --list-media
main
main updates
Main32
Main32 Updates
contrib
contrib updates
contrib32
contrib32 updates
non-free
non-free updates
Non-free32
Non-free32 Updates
restricted
restricted updates
Restricted32
Restricted32 Updates
Main32Updates

¿Qué diferencia hay entre ambos?

Saludos!