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From:   Kai-Heng Feng <kai.heng.feng@canonical.com>
Date:   Thu, 24 Dec 2020 21:26:48 +0800
Message-ID: <CAAd53p7oymvge7DZ1_+7aA45EpNjG=FZ3PNJDv=_UT0ghv+rqQ@mail.gmail.com>
Subject: 802.11ac AP mode support on Realtek 8821AE?
To:     Pkshih <pkshih@realtek.com>
Cc:     linux-wireless <linux-wireless@vger.kernel.org>,
        Ethan Hsieh <ethan.hsieh@canonical.com>,
        Hugh Chao <hugh.chao@canonical.com>
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Hi Ping-Ke,

We've found that when creating 5G AP on 8821AE, it's not on other
devices' wifi list.

Here's the steps I used to create an AP:
$ nmcli c add type wifi ifname wlp3s0 con-name hello autoconnect no ssid hello
$ nmcli c modify hello 802-11-wireless.mode ap ipv4.method shared
802-11-wireless.band a
$ nmcli connection up hello

If we change "802-11-wireless.band" to "bg", then the AP can be
scanned by other devices.
Does 8821AE have hardware capability to support 5G AP?

Kai-Heng