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
information
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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https://bugs.launchpad.net/bugs/1906064
Title:
RTL8812AE stops using 5 Ghz due to wpa_supplicant 4 way
key_mgmt_offload
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