[Bug 1906064] [NEW] RTL8812AE stops using 5 Ghz due to wpa_supplicant 4 way key_mgmt_offload

jan 1906064 at bugs.launchpad.net
Fri Nov 27 20:52:04 UTC 2020

Public bug reported:

On Ubuntu 20.04.1 LTS (GNU/Linux 5.4.0-53-generic x86_64)

RTL8812AE stops using 5 Ghz Wifi after a few days.
The 2.4 Ghz wifi (that was not used, but present in these days) kept working.

During reconnection, the 4-way Wifi authentication failed every time.

Usually, power down and up helps, but this did not give me additional

I tried following, to no avail
1) stopping / restarting wifi from networkmanager
2)removing drivers, and reinstalling
sudo rmmod  rtl8821ae btcoexist rtl_pci rtlwifi  mac80211 cfg80211 libarc4
sudo modprobe rtl8821ae
3) restart wpa_supplicant
sudo systemctl restart wpa_supplicant.service
4) restart networkmanager
sudo service NetworkManager restart

What fixed the problem was disabling key_mgmt_offload

sudo wpa_cli
set key_mgmt_offload 0

So apparently, the WiFi board froze into a state where the  4-way Wifi
authentication could not be handled on the board itself anymore

** Affects: wpasupplicant (Ubuntu)
     Importance: Undecided
         Status: New

** Package changed: gnome-flashback (Ubuntu) => wpasupplicant (Ubuntu)

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  RTL8812AE stops using 5 Ghz due to wpa_supplicant 4 way

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