In openSUSE with KDE, KNetworkManager disconnects from WiFi when a pda is connected and odccm starts the connection.
To stop this from happening, a configuration file can be added to /etc/sysconfig/network to stop KNetworkManager from handling the connection when the device rndis0 is connected:
Add a file ifcfg-<devicename> to /etc/sysconfig/network with the following:
BOOTPROTO='dhcp' BROADCAST='' ETHTOOL_OPTIONS='' IPADDR='' MTU='' NAME='' NETMASK='' NETWORK='' REMOTE_IPADDR='' STARTMODE='hotplug' USERCONTROL='yes'
In my case with openSUSE 10.3 and synce installation from SVN, I added /etc/sysconfig/network/ifcfg-rndis0.
On different distributions, the directory could be /etc/sysconfig/network/interfaces/
The settings were taken from http://www.nabble.com/Moto-Q9m-td15113094.html
Fedora
To stop this from happening, a configuration file can be added to /etc/sysconfig/network-scripts/ to stop NetworkManager from handling the connection when the device rndis0 is connected:
Add a file ifcfg-<devicename> to /etc/sysconfig/network-scripts/ with the following:
TYPE=Ethernet DEVICE=rndis0 BOOTPROTO=dhcp ONBOOT=no USERCTL=yes IPV6INIT=no PEERDNS=yes NM_CONTROLLED=no
In my case with Fedora 9 and SynCE installation from YUM, I added /etc/sysconfig/network-scripts/ifcfg-rndis0.
If you have multiple devices you should add as many ifcfg-<devicename>. Change the line "DEVICE=<devicename>" accordingly.
Do not forget to configure the FirewallPorts.
For Fedora 9 (earlier releases should work as well) you can also disable the Network Manager AS A LAST RESORT using
chkconfig NetworkManager off && chkconfig network on
then reboot. DO NOT take this step if you depend on NM for your wireless (or other) connections. For a normal desktop with a hard ethernet connection, it's fairly safe to disable NM.
Gentoo
On Gentoo, in order to use NetworkManager, and after following SynceInstallation/Gentoo, I first off renamed my interface to rndis1 in udev/rules.d/70-persistent-net.rules :
# USB device 0x0bb4:0x0b51 (rndis_host)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="80:00:60:0f:e8:00", ATTR{type}=="1", KERNEL=="eth*", NAME="rndis1"
Then, I had to block NetworkManager from the rndis connections by adding the following line to /etc/conf.d/rc :
RC_PLUG_SERVICES="!net.rndis*"
After I did this, and following the above guide with 0.11.1 version of synce, I:
/etc/init.d/odccm restart /etc/init.d/NetworkManager restart
Then, I plugged in my T-mobile DASH (S620/Excalibur) and my connection worked by doing a quick pls test command.