As a followon, I tried using wpa_supplicant & editing /etc/network/interfaces, and it all worked fine, so there's nothing inherently wrong with the router or linux, just NM. The key generated by wpa_passphrase was the same as appears in the NM password box after it's failed attempts.
As a followon, I tried using wpa_supplicant & editing /etc/network/ interfaces, and it all worked fine, so there's nothing inherently wrong with the router or linux, just NM. The key generated by wpa_passphrase was the same as appears in the NM password box after it's failed attempts.