Comment 191 for bug 211631

Markus, your screenshot shows a network-manager error:

  nm-dispatcher.action: Caught signal 15, shutting down...

This indicates that some part of NM is not being correctly guarded from /etc/init.d/sendsigs, resulting in abnormal termination that breaks the network connection before network filesystems are being unmounted. Network Manager has previously been fixed for such bugs, but it seems to have recurred.

Please file a new bug report against the network-manager package including the screenshot and this information, and paste the number of the new bug here.