wireless connection issue

[G.]

On Sun, Jun 12, 2011 at 4:49 PM, Nils Kassube <kassube at gmx.net> wrote:
> G. wrote:
>> Kernel IP routing table
>> Destination     Gateway         Genmask        ... Iface
>> 82.239.101.0    0.0.0.0         255.255.255.0  ... eth0
>> 87.90.128.0     0.0.0.0         255.255.240.0  ... wlan0
>> 169.254.0.0     0.0.0.0         255.255.0.0    ... wlan0
>> 0.0.0.0         82.239.101.254  0.0.0.0        ... eth0
> (output above shortened for readability)
>
> The last line is the problem. Like NoOp already wrote, your default
> gateway is on the wrong network for your wlan interface. Actually you
> don't have a default gateway for wlan0 but only for eth0. Could it be
> that you tried to connect via wireless while you were still also
> connected by cable? Without the cable connected you could tell network
> manager to reconnect the wlan0 link, maybe that would repair the routing
> entries.
>
> In your other mail you wrote that you can ping ubuntu.com but not
> google.com. Was that when you were connected by cable? Sorry, I didn't
> explain which address is the router - it is the address of the gateway
> in the line starting with destination 0.0.0.0, i.e. here it is
> 82.239.101.254.
>
> And one more idea: Could it be that you have setup static entries for
> eth0? IIRC, network manager should remove the routing entries for eth0
> when you connect via wlan0.
>
> Finally you could compare the routing details while you use Windows7 for
> the wireless connection. However I can't tell you where to look (I only
> have XP and even there I would have to search where I could find the
> connection details).
>
>
> Nils
>
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Quick reply:  I did everything by cable.  I can only connect on ubuntu
with the cable.

Do not understand what you have written but it is late so maybe I will
understand better in the morning.

Thank you both for your replies!

gary