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Re: Only wireless, no eth0

Just a thought...

# The primary network interface
allow-hotplug eth0

*hotplug*  could this be something to do with udev?  As I get a few
errors messages from udev when booting - I have trouble umounting
discs, and figured that was udev's fault... could it be affecting the
eth0 too?

2010/1/14 Harvey Kelly <harvey1506@googlemail.com>:
> Hi there,
>> What are the contents of your /etc/network/interfaces file?  If it has
>> any entries at all for eth0 then network-manager won't touch it.  By
>> entries I mean "auto eth0", "allow-hotplug eth0", "iface eth0 ..." and
>> so forth.  See /usr/share/doc/network-manager/README.Debian for more
>> details.  If your eth0 isn't being managed by network-manager then I
>> presume that you have an entry for eth0 installed there.
> # The loopback network interface
> auto lo
> iface lo inet loopback
> # The primary network interface
> allow-hotplug eth0
> iface eth0 inet dhcp
>> If you really didn't give it a passphrase for wifi encryption then you
>> must be connecting to an open access point.  Hover over the nm-applet
>> icon and see what tool-tip is displayed.  It will tell you what
>> network you are connected to and if wifi the signal strength.  Left
>> click on the nm-applet icon and it will pop up a pull down menu of
>> known access points.  The one you are connected to will be selected.
>> Between the name and the signal strength bar will be an icon if the
>> access point is secured with encryption.  If it is open there won't be
>> an icon there.
> This is getting bizarre... yes there's a secured icon there.  But it
> didn't ask me for a password - I checked with my girlfriend's laptop -
> and sure enough it asked for it.
>> By default network-manager will prefer a wired connection.  If you
>> plug in a wire it will notice the link status change and automatically
>> drop the wifi connection and connect to the wired network.
> No, it's not!
>> testing you can right-click on the nm-applet and disable wireless
>> entirely.  That will prevent it from connecting to wireless!  Then you
>> can debug your wired connection issues in isolation.  In the
>> right-click menu is an "Edit Wireless Networks".  You can delete
>> unwanted wifi connections and other actions.
> I got zero internet if I disable wireless.
>> Disclaimer: I am not updated with the latest Squeeze.  This certainly
>> applies to Lenny.  I may have stale information concerning Squeeze and
>> Sid if something has changed there.
> This is all very weird eh?
>> Use of network-manager is a love-hate relationship with many of us.
>> Sometimes a lot more hate than love there. :-)
> I remember running etch and NM being a source of much frustration...
> H

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