May 19, 2014
Network Manager disappeared from LMDE after Update Pack 8
After LMDE got upgraded to UP8, in mate, you should notice the Network Manager icon does not appear in your Notification Area.
The reason behind is that your LMDE reset this file:
/etc/dbus-1/system.d/org.freedesktop.NetworkManager.conf
To fix it, try backing up the file and do a global replace of the string "deny" to "allow" in the file.
> cd /etc/dbus-1/system.d > sudo cp org.freedesktop.NetworkManager.conf org.freedesktop.NetworkManager.conf.backup > sudo vi org.freedesktop.NetworkManager.conf
Command %s/deny/allow replaces all occurrence. Save and restart LMDE.