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NetworkManager and teamd

Originally report here.

NetworkManager dont work with teamd for network teaming. It cannot bring up team interface and slaves, service missing CAP_CHOWN in CapabilityBoundingSet.

Jun 03 14:45:36 nasserver NetworkManager[5366]: Unable to change  ownership of /run/teamd/ to teamd/daemon (Operation not permitted)
Jun 03 14:45:36 nasserver NetworkManager[5366]: Failed to drop privileges
Jun 03 14:45:36 nasserver NetworkManager[1187]: <info>   [1591188336.4192] device (eno2): state change: disconnected ->  prepare (reason 'none', sys-iface-state: 'managed')
Jun 03 14:45:36 nasserver NetworkManager[1187]: <info>   [1591188336.4201] device (eno2): state change: prepare -> config  (reason 'none', sys-iface-state: 'managed')
Jun 03 14:45:36 nasserver NetworkManager[1187]: <warn>   [1591188336.4229] device (team0): teamd process 5366 quit unexpectedly;  failing activation
Jun 03 14:45:36 nasserver NetworkManager[1187]: <info>   [1591188336.4229] device (team0): state change: prepare -> failed  (reason 'teamd-control-failed', sys-iface-state: 'managed')
Jun 03 14:45:36 nasserver NetworkManager[1187]: <warn>   [1591188336.4251] device (team0): Activation: failed for connection  'lan.team'
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