I had an issue connecting to my Wi-Fi where the connection would constantly cycle between connected and disconnected, with device (wlan0): failure to start DHCPv6: failed to start client: Address already in use appearing repeatedly in the output for journalctl -u NetworkManager right before the connection would disconnect.
Running sudo systemctl disable --now dhcpcd fixed it.
I had an issue connecting to my Wi-Fi where the connection would constantly cycle between connected and disconnected, with
device (wlan0): failure to start DHCPv6: failed to start client: Address already in useappearing repeatedly in the output forjournalctl -u NetworkManagerright before the connection would disconnect.Running
sudo systemctl disable --now dhcpcdfixed it.