Creating vlan fails with NME_UNSPEC

Got NME_UNSPEC error when activating VLAN connection with the same parent device, same vlan_id but different ipv4 configuration.

Please also take a look:

Hi @doct0rHu @ahkok any feedback would be much appreciated. Hope you could fix the bug soon.

This is the unspecified error. You need to report this to the upstream and get freeback from there.

Sorry, how do i report it to the upstream?

NetworkManager is hosted on Gitlab, you report at

Sometimes, it really is NetworkManager’s fault. If you think that’s the case, please file a bug at:
Attaching NetworkManager debug logs from the journal (or wherever your distribution directs syslog’s ‘daemon’ facility output, as /var/log/messages or /var/log/daemon.log) is often very helpful, and (if you can get) a working wpa_supplicant config file helps enormously.

just opened this one: