I confirm that after suspend, my ethernet devices don't come up as well.
The following commands are needed to restore them again:

sudo ifconfig -s eth1 up
sudo ifconfig -s eth0 up
sudo killall NetworkManager -KILL
sudo /etc/dbus-1/event.d/25NetworkManager start

Which gets boring after a while. NetworkManager seems to hang on the
non-existing devices so needs to be killed hard.

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When I hibernate my laptop, the ethernet  interface vanishes
https://bugs.launchpad.net/bugs/148116
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