Hi @all,

this is my first post on the launchpad - so please excuse any formal mistakes.

What you've described, I've also figured out. It's really frustating, that after bootup I do never have an internet connection automatically. 
My "/etc/network/interfaces" is empty except the "auto lo" entry and I've enabled the roaming mode for the wired connection. But on bootup my eth0 (I have only this device for networking)  will be deactivated every time. I need then to "deactivate network" and "activate network" on the n-m icon at the gnome-panel to get online. Does anyone have a suggestion, how this could be solved?

entries in /var/log/syslog

during the boot up:

...
NetworkManager: <info>  Updating allowed wireless network lists. 
NetworkManager: <WARN>  nm_dbus_get_networks_cb(): error received: org.freedesktop.NetworkManagerInfo.NoNetworks - There are no wireless networks stored.. 
kernel: [   98.348000] NET: Registered protocol family 10
kernel: [   98.348000] lo: Disabled Privacy Extensions
kernel: [   98.348000] ADDRCONF(NETDEV_UP): eth0: link is not ready

and now the deactive/activate action:

NetworkManager: <info>  Disconnected. 
NetworkManager: <info>  Enabling networking. 
NetworkManager: <info>  Deactivating device eth0. 
kernel: [  250.216000] ADDRCONF(NETDEV_UP): eth0: link is not ready
NetworkManager: <info>  eth0: Device is fully-supported using driver 'uli526x'. 
NetworkManager: <info>  nm_device_init(): waiting for device's worker thread to start 
NetworkManager: <info>  nm_device_init(): device's worker thread started, continuing. 
NetworkManager: <info>  Now managing wired Ethernet (802.3) device 'eth0'. 
NetworkManager: <info>  Deactivating device eth0. 
kernel: [  253.216000] uli526x: eth0 NIC Link is Up 100 Mbps Full duplex
kernel: [  253.216000] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
NetworkManager: <info>  Will activate wired connection 'eth0' because it now has a link. 
NetworkManager: <info>  SWITCH: no current connection, found better connection 'eth0'. 
dhcdbd: message_handler: message handler not found under /com/redhat/dhcp/eth0 for sub-path eth0.dbus.get.reason
NetworkManager: <info>  Will activate connection 'eth0'. 
NetworkManager: <info>  Device eth0 activation scheduled... 
NetworkManager: <info>  Activation (eth0) started... 
NetworkManager: <info>  Activation (eth0) Stage 1 of 5 (Device Prepare) scheduled... 
NetworkManager: <info>  Activation (eth0) Stage 1 of 5 (Device Prepare) started... 
NetworkManager: <info>  Activation (eth0) Stage 2 of 5 (Device Configure) scheduled... 
NetworkManager: <info>  Activation (eth0) Stage 1 of 5 (Device Prepare) complete. 
NetworkManager: <info>  Activation (eth0) Stage 2 of 5 (Device Configure) starting... 
NetworkManager: <info>  Activation (eth0) Stage 2 of 5 (Device Configure) successful. 
NetworkManager: <info>  Activation (eth0) Stage 3 of 5 (IP Configure Start) scheduled. 
NetworkManager: <info>  Activation (eth0) Stage 2 of 5 (Device Configure) complete. 
NetworkManager: <info>  Activation (eth0) Stage 3 of 5 (IP Configure Start) started... 
NetworkManager: <info>  Activation (eth0) Beginning DHCP transaction. 
NetworkManager: <info>  Activation (eth0) Stage 3 of 5 (IP Configure Start) complete. 
NetworkManager: <info>  DHCP daemon state is now 12 (successfully started) for interface eth0 
NetworkManager: <info>  DHCP daemon state is now 1 (starting) for interface eth0 
kernel: [  255.592000] NET: Registered protocol family 17
dhclient: DHCPREQUEST on eth0 to 255.255.255.255 port 67
dhclient: DHCPACK from 192.168.2.1
NetworkManager: <info>  DHCP daemon state is now 4 (reboot) for interface eth0 
NetworkManager: <info>  Activation (eth0) Stage 4 of 5 (IP Configure Get) scheduled... 
NetworkManager: <info>  Activation (eth0) Stage 4 of 5 (IP Configure Get) started... 
dhcdbd: message_handler: message handler not found under /com/redhat/dhcp/eth0 for sub-path eth0.dbus.get.domain_name
dhcdbd: message_handler: message handler not found under /com/redhat/dhcp/eth0 for sub-path eth0.dbus.get.nis_domain
dhcdbd: message_handler: message handler not found under /com/redhat/dhcp/eth0 for sub-path eth0.dbus.get.nis_servers
NetworkManager: <info>  Retrieved the following IP4 configuration from the DHCP daemon: 
NetworkManager: <info>    address 192.168.2.101 
NetworkManager: <info>    netmask 255.255.255.0 
NetworkManager: <info>    broadcast 192.168.2.255 
NetworkManager: <info>    gateway 192.168.2.1 
NetworkManager: <info>    nameserver 62.53.220.118 
NetworkManager: <info>    nameserver 193.189.244.205 
NetworkManager: <info>    hostname 'dhcppc1' 
NetworkManager: <info>  Activation (eth0) Stage 5 of 5 (IP Configure Commit) scheduled... 
NetworkManager: <info>  Activation (eth0) Stage 4 of 5 (IP Configure Get) complete. 
NetworkManager: <info>  Activation (eth0) Stage 5 of 5 (IP Configure Commit) started... 
dhclient: bound to 192.168.2.101 -- renewal in 106343 seconds.
NetworkManager: <info>  Clearing nscd hosts cache. 
NetworkManager: <WARN>  nm_spawn_process(): nm_spawn_process('/usr/sbin/nscd -i hosts'): could not spawn process. (Failed to execute child process "/usr/sbin/nscd" (No such file or directory))  
NetworkManager: <info>  Activation (eth0) successful, device activated. 
NetworkManager: <info>  Activation (eth0) Finish handler scheduled. 
NetworkManager: <info>  Activation (eth0) Stage 5 of 5 (IP Configure Commit) complete.