From nobody Wed Aug 20 09:16:13 2025 X-Original-To: wireless@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4c6LRM3rqLz64fJC for ; Wed, 20 Aug 2025 09:16:15 +0000 (UTC) (envelope-from avg@FreeBSD.org) Received: from smtp.freebsd.org (smtp.freebsd.org [96.47.72.83]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "smtp.freebsd.org", Issuer "R11" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4c6LRM2zGNz3mZ5; Wed, 20 Aug 2025 09:16:15 +0000 (UTC) (envelope-from avg@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1755681375; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=QLHv60JUg0tqNs4/y6Lk7GZaECBm2CFbugaHjgwkjCI=; b=A+9w668cSf7Hgd2x6BiEvyWUect7KY1VkWijw+Ah7/dTghHJTyqBD3jlSZ1+KZRGmFTgCK BoDW3oVSu51QtEyzPgUpQlidA5208ah7n7PETeKVCx9nar/B7S9Am8s889LRHkUyvm+Vkv komBCV99LXKAU2pJCZm8Qyo/hghJLO7pfdM4gTyC2+QjvX9m2ygivYV0r1kqDUAUGeZ7aW L7AJ0exjm/PZmXIomsH2BtolrKTrjDRkKwi5pKiWbixPvrFJF1EmrlfGWY2WiIC8TQeeIt vbS5s2a9TVOxkvApml5aWuJsqJ2FnqqiXlV51RSSvxsIVGXnAJ4ZAniwrhS6Gw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1755681375; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=QLHv60JUg0tqNs4/y6Lk7GZaECBm2CFbugaHjgwkjCI=; b=EKmtUhssdFpP8YcY/9k8B+8w6lWNeiNe3qyYYKH8p1sbQUX89zw/9mxoghTf/LeXW+DS/R r8pSH9gVTe07OS8CtPumBylAaebeZyEa6PBk2nL7uwMni0Cc4ChO+h7+s0IGyve8NsoUBj 3qzdCdHL8qLZQVGXgNqI+wxMQERadaaeCKOO8f1cStXiCuba0FTH5z/tJt2TalQIvkv4yz SINwu0/KBDUepPiNrhfFYi7JZ68zZhz7bJA7hL8CiVZLWQOElEymiwXkBq5z/yNVjMcsC2 8xVLKL4SyCln7ZSzNX1MJSleAhCjxm3If8SklYp3AC+vli7iyuKbi+3NV71fUw== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1755681375; a=rsa-sha256; cv=none; b=GNYrSCICCl3OXzMu1irLsf6YtjB3EcJM98OF4GFO0VhTo6PgK2Kq9QQfRWUeCH+7Xx/4Lz QVSlHeCMEVAYwoPOdG4BfP/cQFDiaXTf/v2ISvigkD/J/ZeAgynfBgG1isPqyBbX3dWt3r a/xRbA81E4kOyW76Y+SmMVW2I+Vn6YZgeTH+MM2ridwvPAwapVmAw5AIbxWfCOd1d54Gsc nOClJQbP33ZvcLQPp39fxv03ZJyg+mteqsSKTPOpGjSCIVGE3yItml3zKWd4SLusL80PDm oLRgL9XaQBO3dn6VJXlYe56WWNW8qEHixmbzcWXm7ZJemuTmlzaAHETZaHahCg== ARC-Authentication-Results: i=1; mx1.freebsd.org; none Received: from [192.168.0.88] (unknown [93.188.39.137]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) (Authenticated sender: avg/mail) by smtp.freebsd.org (Postfix) with ESMTPSA id 4c6LRL5yVVzQB5; Wed, 20 Aug 2025 09:16:14 +0000 (UTC) (envelope-from avg@FreeBSD.org) Message-ID: <1fcadaba-361b-45f1-bd8f-e1dae8d2bcb1@FreeBSD.org> Date: Wed, 20 Aug 2025 12:16:13 +0300 List-Id: Discussions List-Archive: https://lists.freebsd.org/archives/freebsd-wireless List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: freebsd-wireless@freebsd.org Sender: owner-freebsd-wireless@FreeBSD.org MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: rtwn/rtl8821au: strange issue with 5GHz channels From: Andriy Gapon To: "Bjoern A. Zeeb" Cc: Adrian Chadd , FreeBSD wireless mailing list References: <4cb1c608-d534-4bfb-8cc9-92251000e0fd@FreeBSD.org> <9243aad2-20d1-4c17-8f9a-f5b682eb1f85@freebsd.org> Content-Language: en-US Autocrypt: addr=avg@FreeBSD.org; keydata= xsDNBGcKrHEBDADRvwQOK0b/yo4ys5cs6bOQMhEh4xtfbaZ/CU00cpPgUip3sOZCdrtMWlRC g25z97prxE9pKueZi+HXDhIPpa9xl14ghqF4oYScuJ1i18HyiOH2y5Q3Vv/TtFiSzicd3EAu QgS3jVidpgDSPDdj2Yz3UxYpZ+PuFl6nOnvCvqOFcjUlzKCyPaiN2b86l1Nscmhnc+zQ/faB erUOEFEDQbWMA5YfXi8HrbeR16hfRfGt7E0aMDlIj9FIPIq71UWMN9CimPgs4+rbNr1MAlLa z4GxSDhVYZEY5rqtCzr+PLXboRQWnaUwXl0/biw9enf17NHdYv1SNAFTX2eC4dZ3qBVI74dS PgNprm+PMfz+6Hhs/dAv+Nan5nVhg3EFIjYTiy0MnjMSq8uI0v0ykpAGAcJJ5xl6d23aLxgN 6f0z6pJRCO0hGPgU7UzvFD0MxJxmbzqdT1R51KDan1oD41b+tjl2LMBuCDCoB0U44Pu0zLdp xMfFTxCXtwIYKIUxwd28jwMAEQEAAc0eQW5kcml5IEdhcG9uIDxhdmdARnJlZUJTRC5vcmc+ wsENBBMBCAA3FiEEmXvSmjiQFHPVOpLnzDOt5NLj67sFAmcKrHEFCQeEzgACGwMECwkIBwUV CAkKCwUWAgMBAAAKCRDMM63k0uPru5tSDACFK15LLbq89RSQ6QMnjiIm1t/wYJyumb519MHu Dhzxx1lbr8oghf0RHtF6kYRLQPaW2VdToi74pRobd3CN4bhZKDLSL6WfTn17RfavDjL6Njwp KBo30CkOeYKWq1mDmo0xEoQj8cc7ybEZnus+YScZOpj8Ti4EFwhRt6SHer7YDb161IHKL8m4 MsCxpFSGEjbKj8Iul3Ri/fTOO8w14ivcuEEQIvJt4/+4YV5Az8G23wKzL/3aJ7SOT3oYGmR9 atBTmVO3DlODjM+rZLegd8SfLSPTcBTHspWE5duemIzZbEX3BP77r3Qx4Fo5Tkit3bG1XVar yPQato+sFGFEGifdE9USBQoAoOaaeZevwAWjDU0TIuCT0CUe0sKtQuNP4LRq0n9EEHOXBu9a CfdMhFUSkAZnuE7miSVwgPvoVNJ1stA37EXLN/sVsWik7wslTQ5vF81VpdGFiwoQPOe2XEKh ogcwGSnXbwv1gD4x+Gz/7Y+kFyr1NY+4/nSaeXVcS2fOwM0EZwqscgEMAMQTe6ypAmQe/TFO HqKD2hfFKdksTptKi6uEh8xIwct8G/0FBldDWXo9eu8CGr/ZrDg0/bAwJxbaLRQCMH19Gq2Y hLvZ1QK5GQJVzZKcqfxbF2LiDUTs6WkdOBIhGpdDy7p1xFrvqCGCtNFYHuGYm067EozibBSF BWAPstKu2FQuVHZNMOfs7p3OIz3Yfqu9woXDeg3/8G2qVQJINe+8EwXKlhgh4CyDbq7nAZoA kIu1SE9z9u3WI5mcNy/0dFmVUsFxBqRC3ewbvzie8tKyZ9yFOlaZPT0Y4nRBXQTI3mLZ8zQ8 mtrWK5OOmrJ02kdeO9RBXe+OMaUUWMf92ZIoBFb4HP6N+B+4N1y1OwULousfl7JRoYxA4MRL ls7E2sSoJvrEBTJB3Pc34xu8rsJ1A5V3NgN6djX8yEZYpTRkcmrBeWy/ofDqZPVqneAx0LRm eldDS9msXDW4KXODyPZ+9unvmHAcoH0xaBYaSH44CDZDQDg4LNcmbOvuu1TEXBJhjQARAQAB wsD8BBgBCAAmFiEEmXvSmjiQFHPVOpLnzDOt5NLj67sFAmcKrHMFCQeEzgACGwwACgkQzDOt 5NLj67sUCAv5AXqgWnYN9EblapMbZjkiqL8pZQ0GNqh+Pg9FwbyULxjtRTO6rD4D0IxizByb ef+neeUNyYlagt5nfKMysEr0SU/gHKCi8vyTF/63ukMrGUNGmJJxrndl5ZYKC6j6eX7twrZF L1Uvlmn6FnQ22red5kHO93fDjG4zaDIZvHfwj7kzjZ4tpC7Byinf88s14mdZeScc0PnU2hj4 UGYju/wg2FF4YxaZYhcmdTiRYY0Wx85XSMZv19pnn78sadEuRvfRd4JTmw++j1xGXeqQGWzz /CTG5/Ex9GAkQ02hZbmi236byDXoet4G8TEyOph9QFVkV9bNd0jQZaFZPGEj4PSPUYGAF7s5 xJaNGgctC3aZ7WjEv1FBoo44XCU4xcjJ1wZQUrHxRhx6TW0Jtcl0U9qfKFW30TSPo6RyiXuj X4ltWKAtjoXB8nUmEJckaz7IRu2b4pXDeazZuz5JBygUs10yJjDxh2vFQZo0KaBAPx9MZlPn gpPTjT15L8xGftEjQXF6 In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 20/08/2025 11:43, Andriy Gapon wrote: > I did a short experiment and set regdomain ETSI country DE. > Strange thing is that "list scan" did not show any 5GHz channels (from my and > neighboring APs) at all. > "list chan" did list them correctly. After writing this I did another experiment and finally got some success. Previously I noticed that the channels I tried to use had some restrictions (passive and/or DFS), so I decided to try ETSI and channel 36 (no restrictions). That worked! In ac / VHT80 mode. $ ifconfig wlan0 wlan0: flags=8843 metric 0 mtu 1500 options=200001 ether 08:be:ac:3e:a9:ee groups: wlan ssid HolyLan channel 36 (5180 MHz 11a vht/80+) bssid 7a:d2:94:80:1f:ec regdomain ETSI country DE indoor authmode WPA2/802.11i privacy ON deftxkey UNDEF AES-CCM 2:128-bit txpower 23 bmiss 7 mcastrate 6 mgmtrate 6 scanvalid 60 ampdulimit 64k shortgi -stbc ldpctx -ldpcrx -uapsd vht vht40 vht80 -vht160 -vht80p80 wme roaming MANUAL parent interface: rtwn0 media: IEEE 802.11 Wireless Ethernet VHT mode 11ac status: associated nd6 options=29 iperf measured real bandwidth of 146 Mbits/sec. Another quirk that I noticed during my experiments is that it is best to unplug and re-plug the adapter after making any config changes on the AP side, otherwise the adapter (or its firmware, or the driver) remembers some old things and sees some new things and is very confused. Even ifconfig wlan0 destroy + ifconfig wlan0 create ... does not help. -- Andriy Gapon