Same problem here. The VM doesn't get an IP via DHCP.
2011-08-02 21:40:34 Kubuntu64 NetworkManager <WARN> default_adapter_cb(): bluez error getting default adapter: The name org.bluez was not provided by any .service files
2011-08-02 21:40:34 Kubuntu64 NetworkManager <info> Trying to start the supplicant...
2011-08-02 21:40:34 Kubuntu64 NetworkManager <info> Activation (eth0) starting connection 'Auto eth0'
2011-08-02 21:40:34 Kubuntu64 NetworkManager <info> (eth0): device state change: 3 -> 4 (reason 0)
2011-08-02 21:40:34 Kubuntu64 NetworkManager <info> Activation (eth0) Stage 1 of 5 (Device Prepare) scheduled...
2011-08-02 21:40:34 Kubuntu64 NetworkManager <info> Activation (eth0) Stage 1 of 5 (Device Prepare) started...
2011-08-02 21:40:34 Kubuntu64 NetworkManager <info> Activation (eth0) Stage 2 of 5 (Device Configure) scheduled...
2011-08-02 21:40:34 Kubuntu64 NetworkManager <info> Activation (eth0) Stage 1 of 5 (Device Prepare) complete.
2011-08-02 21:40:34 Kubuntu64 NetworkManager <info> Activation (eth0) Stage 2 of 5 (Device Configure) starting...
2011-08-02 21:40:34 Kubuntu64 NetworkManager <info> (eth0): device state change: 4 -> 5 (reason 0)
2011-08-02 21:40:34 Kubuntu64 NetworkManager <info> Activation (eth0) Stage 2 of 5 (Device Configure) successful.
2011-08-02 21:40:34 Kubuntu64 NetworkManager <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) scheduled.
2011-08-02 21:40:34 Kubuntu64 NetworkManager <info> Activation (eth0) Stage 2 of 5 (Device Configure) complete.
2011-08-02 21:40:34 Kubuntu64 NetworkManager <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) started...
2011-08-02 21:40:34 Kubuntu64 NetworkManager <info> (eth0): device state change: 5 -> 7 (reason 0)
2011-08-02 21:40:34 Kubuntu64 NetworkManager <info> Activation (eth0) Beginning DHCP transaction (timeout in 45 seconds)
2011-08-02 21:40:34 Kubuntu64 NetworkManager <info> dhclient started with pid 747
2011-08-02 21:40:34 Kubuntu64 NetworkManager <info> Activation (eth0) Stage 4 of 5 (IP6 Configure Get) scheduled...
2011-08-02 21:40:34 Kubuntu64 NetworkManager <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) complete.
2011-08-02 21:40:34 Kubuntu64 NetworkManager <info> Activation (eth0) Stage 4 of 5 (IP6 Configure Get) started...
2011-08-02 21:40:34 Kubuntu64 NetworkManager <info> Activation (eth0) Stage 4 of 5 (IP6 Configure Get) complete.
2011-08-02 21:40:34 Kubuntu64 NetworkManager <info> modem-manager is now available
2011-08-02 21:40:34 Kubuntu64 dhclient Internet Systems Consortium DHCP Client V3.1.3
2011-08-02 21:40:34 Kubuntu64 dhclient Copyright 2004-2009 Internet Systems Consortium.
2011-08-02 21:40:34 Kubuntu64 dhclient All rights reserved.
2011-08-02 21:40:34 Kubuntu64 dhclient For info, please visit
https://www.isc.org/software/dhcp/
2011-08-02 21:40:34 Kubuntu64 dhclient
2011-08-02 21:40:34 Kubuntu64 modem-manager Loaded plugin ZTE
2011-08-02 21:40:34 Kubuntu64 modem-manager Loaded plugin Nokia
2011-08-02 21:40:34 Kubuntu64 modem-manager Loaded plugin Huawei
2011-08-02 21:40:34 Kubuntu64 modem-manager Loaded plugin Sierra
2011-08-02 21:40:34 Kubuntu64 NetworkManager <info> DHCP: device eth0 state changed (null) -> preinit
2011-08-02 21:40:34 Kubuntu64 dhclient Listening on LPF/eth0/00:1c:42:13:5f:d7
2011-08-02 21:40:34 Kubuntu64 dhclient Sending on LPF/eth0/00:1c:42:13:5f:d7
2011-08-02 21:40:34 Kubuntu64 dhclient Sending on Socket/fallback
2011-08-02 21:40:34 Kubuntu64 dhclient DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 8
2011-08-02 21:40:34 Kubuntu64 modem-manager Loaded plugin Option High-Speed
2011-08-02 21:40:34 Kubuntu64 modem-manager Loaded plugin Ericsson MBM
2011-08-02 21:40:34 Kubuntu64 modem-manager Loaded plugin Option
2011-08-02 21:40:34 Kubuntu64 modem-manager Loaded plugin AnyData
2011-08-02 21:40:34 Kubuntu64 modem-manager Loaded plugin Generic
2011-08-02 21:40:34 Kubuntu64 modem-manager Loaded plugin MotoC
2011-08-02 21:40:34 Kubuntu64 modem-manager Loaded plugin Gobi
2011-08-02 21:40:34 Kubuntu64 modem-manager Loaded plugin Longcheer
2011-08-02 21:40:34 Kubuntu64 modem-manager Loaded plugin Novatel
2011-08-02 21:40:35 Kubuntu64 cron[811] (CRON) INFO (pidfile fd = 3)
2011-08-02 21:40:35 Kubuntu64 acpid starting up with proc fs
2011-08-02 21:40:35 Kubuntu64 anacron[825] Anacron 2.3 started on 2011-08-02
2011-08-02 21:40:35 Kubuntu64 cron[826] (CRON) STARTUP (fork ok)
2011-08-02 21:40:35 Kubuntu64 init apport pre-start process (803) terminated with status 1
2011-08-02 21:40:35 Kubuntu64 init apport post-stop process (828) terminated with status 1
2011-08-02 21:40:35 Kubuntu64 anacron[825] Normal exit (0 jobs run)
2011-08-02 21:40:35 Kubuntu64 cvslockd CVS Lock service initialised successfully
2011-08-02 21:40:35 Kubuntu64 cron[826] (CRON) INFO (Running @reboot jobs)
2011-08-02 21:40:35 Kubuntu64 acpid 36 rules loaded
2011-08-02 21:40:35 Kubuntu64 acpid waiting for events: event logging is off
2011-08-02 21:40:35 Kubuntu64 acpid client connected from 762[0:0]
2011-08-02 21:40:35 Kubuntu64 acpid 1 client rule loaded
2011-08-02 21:40:35 Kubuntu64 avahi-daemon[683] Registering new address record for fe80::21c:42ff:fe13:5fd7 on eth0.*.
2011-08-02 21:40:37 Kubuntu64 kernel [ 24.688055] ppdev: user-space parallel port driver
2011-08-02 21:40:38 Kubuntu64 anacron[960] Anacron 2.3 started on 2011-08-02
2011-08-02 21:40:38 Kubuntu64 anacron[960] Normal exit (0 jobs run)
2011-08-02 21:40:39 Kubuntu64 init plymouth-stop pre-start process (1034) terminated with status 1
2011-08-02 21:40:39 Kubuntu64 kdm_greet[898] Cannot load /usr/share/kde4/apps/kdm/faces/.default.face: Datei oder Verzeichnis nicht gefunden
2011-08-02 21:40:42 Kubuntu64 dhclient DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 21
2011-08-02 21:40:45 Kubuntu64 kernel [ 32.420659] eth0: no IPv6 routers present
2011-08-02 21:41:03 Kubuntu64 dhclient DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 7
2011-08-02 21:41:10 Kubuntu64 dhclient DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 11
2011-08-02 21:41:20 Kubuntu64 NetworkManager <info> (eth0): DHCP transaction took too long, stopping it.
2011-08-02 21:41:20 Kubuntu64 NetworkManager <info> (eth0): canceled DHCP transaction, dhcp client pid 747
2011-08-02 21:41:20 Kubuntu64 NetworkManager <info> Activation (eth0) Stage 4 of 5 (IP4 Configure Timeout) scheduled...
2011-08-02 21:41:20 Kubuntu64 NetworkManager <info> Activation (eth0) Stage 4 of 5 (IP4 Configure Timeout) started...
2011-08-02 21:41:20 Kubuntu64 NetworkManager <info> (eth0): device state change: 7 -> 9 (reason 5)
2011-08-02 21:41:20 Kubuntu64 NetworkManager <info> Marking connection 'Auto eth0' invalid.
2011-08-02 21:41:20 Kubuntu64 NetworkManager <info> Activation (eth0) failed.
2011-08-02 21:41:20 Kubuntu64 NetworkManager <info> Activation (eth0) Stage 4 of 5 (IP4 Configure Timeout) complete.
2011-08-02 21:41:20 Kubuntu64 NetworkManager <info> (eth0): device state change: 9 -> 3 (reason 0)
2011-08-02 21:41:20 Kubuntu64 NetworkManager <info> (eth0): deactivating device (reason: 0).