Installing a network restart service as suggested on https://askubuntu.com/questions/761180/wifi-doesnt-work-after-suspend-after-16-04-upgrade
has fixed the problem. Even so this only restarts the network-manager.service, the other problems are solved as well: Sound ok, shutdown is working. -- Wolf-Dieter ------------------------------------------------------------------------
smime.p7s
Description: S/MIME Cryptographic Signature
