Ubuntu 18.04/19.10/20.04, wlan0 doesn't have inet6 link local address generated automaticlly.

[Raymond.Liu]

Recently I installed 18/19/20 Ubuntu to my Dell desktop, which has eht0 and plugged-in wlan0. But for wlan0, it would never get any link-local inet6 address bind even it associated to AP successfully. eth0 works well same as older Ubuntu version behaviour (16.04).
After wlan0 connected to AP, IPV4 is all good. but IPV6 link-local never appeared. manually add v6 address works. dhclient -6 wlan0 will never work since it doesn't have a link-local address.
Similar act on eth0 will not have this problem. whenever the eht0 connects physically, it gets inet6 generated automatically.

Doubted that new 20.04 (including 19.10/18.04) kernel missing this part -> inet6 generated for wifi adapters when a physical connection has established?

[Gunnar Hjalmarsson (gunnarhj)]

ubuntu-docs is a package for the desktop documentation, which this issue apparently is not about. Please make an effort yourself to find a reasonable package.

Changing affected package to the generic "Ubuntu" in the meantime.

[Paul White (paulw2u)]

With no response to comment #1 after over three years I'm closing this as 'Invalid'.