Comment 8 for bug 105243

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Dennis Jarosch (dennis-jarosch) wrote :

I had the same problem and this is how I fixed it:

* shutdown NetworkManager, e.g. with 'sudo kill -2'.

* backup your /etc/network/interfaces:

sudo mv /etc/network/interfaces /etc/network/interfaces_bak

* restart NetworkManager:

sudo /usr/sbin/NetworkManager --pid-file /var/run/NetworkManager/NetworkManager.pid

Apparently NetworkManager is a little flaky with certain entries in the interfaces file.