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From: Lorenzo Bianconi <lorenzo@kernel.org>
To: Jan Fuchs <jf@simonwunderlich.de>
Cc: linux-wireless@vger.kernel.org, nbd@nbd.name,
	linux-mediatek <linux-mediatek@lists.infradead.org>
Subject: Re: mt76: MT7921K monitor mode not working
Date: Thu, 2 Dec 2021 23:13:31 +0100	[thread overview]
Message-ID: <YalFC7UlCPsCSZqE@lore-desk> (raw)
In-Reply-To: <7e156597-a206-b236-e4c8-d476614de7ef@simonwunderlich.de>


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> Hi,

Hi Jan,

> 
> we are not able to obtain any packets when packet capturing with the
> Mediatek MT7921K in monitor mode on 2.4, 5 and 6 GHz.
> tcpdump will show you 0 recorded packets. When doing a "iw dev wls1 scan" on
> a parallel running managed interface on the same phy, the packet capture
> will contain beacons and probe responses from the scan though.
> Can anyone confirm that?
> 
> mt76 (https://github.com/openwrt/mt76/commits/master): commit
> 6fad970893dd26ef6e6c8344b958344254f6362a (HEAD -> master, origin/master,
> origin/HEAD)
> Kernel: 5.16.0-rc2-next-20211124+
> WM Firmware Version: ____010000, Build Time: 20211014150922

IIRC you need to disable runtime-pm and deep-sleep to proper enable monitor
mode:

echo 0 > /sys/kernel/debug/ieee80211/phy<x>/mt76/runtime-pm
echo 0 > /sys/kernel/debug/ieee80211/phy<x>/mt76/deep-sleep

Can you please give it whirl?

Regards,
Lorenzo

> 
> Steps to reproduce:
> sudo iw dev wls1 del
> sudo iw phy phy0 interface add mon0 type monitor
> sudo ip link set dev mon0 up
> sudo iw dev mon0 set freq 6115
> sudo tcpdump -i mon0 -w 6g-capture.pcap
> 
> Kinds regards, Jan
> 

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WARNING: multiple messages have this Message-ID (diff)
From: Lorenzo Bianconi <lorenzo@kernel.org>
To: Jan Fuchs <jf@simonwunderlich.de>
Cc: linux-wireless@vger.kernel.org, nbd@nbd.name,
	linux-mediatek <linux-mediatek@lists.infradead.org>
Subject: Re: mt76: MT7921K monitor mode not working
Date: Thu, 2 Dec 2021 23:13:31 +0100	[thread overview]
Message-ID: <YalFC7UlCPsCSZqE@lore-desk> (raw)
In-Reply-To: <7e156597-a206-b236-e4c8-d476614de7ef@simonwunderlich.de>

[-- Attachment #1: Type: text/plain, Size: 1172 bytes --]

> Hi,

Hi Jan,

> 
> we are not able to obtain any packets when packet capturing with the
> Mediatek MT7921K in monitor mode on 2.4, 5 and 6 GHz.
> tcpdump will show you 0 recorded packets. When doing a "iw dev wls1 scan" on
> a parallel running managed interface on the same phy, the packet capture
> will contain beacons and probe responses from the scan though.
> Can anyone confirm that?
> 
> mt76 (https://github.com/openwrt/mt76/commits/master): commit
> 6fad970893dd26ef6e6c8344b958344254f6362a (HEAD -> master, origin/master,
> origin/HEAD)
> Kernel: 5.16.0-rc2-next-20211124+
> WM Firmware Version: ____010000, Build Time: 20211014150922

IIRC you need to disable runtime-pm and deep-sleep to proper enable monitor
mode:

echo 0 > /sys/kernel/debug/ieee80211/phy<x>/mt76/runtime-pm
echo 0 > /sys/kernel/debug/ieee80211/phy<x>/mt76/deep-sleep

Can you please give it whirl?

Regards,
Lorenzo

> 
> Steps to reproduce:
> sudo iw dev wls1 del
> sudo iw phy phy0 interface add mon0 type monitor
> sudo ip link set dev mon0 up
> sudo iw dev mon0 set freq 6115
> sudo tcpdump -i mon0 -w 6g-capture.pcap
> 
> Kinds regards, Jan
> 

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  reply	other threads:[~2021-12-02 22:13 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-01  9:41 mt76: MT7921K monitor mode not working Jan Fuchs
2021-12-01  9:41 ` Jan Fuchs
2021-12-02 22:13 ` Lorenzo Bianconi [this message]
2021-12-02 22:13   ` Lorenzo Bianconi
2021-12-03 15:32   ` Sven Eckelmann
2021-12-03 15:32     ` Sven Eckelmann
2021-12-03 16:09     ` Lorenzo Bianconi
2021-12-03 16:09       ` Lorenzo Bianconi
     [not found] <YapBMGjLcjuBo/vw@lore-desk--annotate>
2021-12-03 17:10 ` sean.wang
2021-12-03 17:10   ` sean.wang
2021-12-03 17:27   ` Lorenzo Bianconi
2021-12-03 17:27     ` Lorenzo Bianconi
     [not found] <YapTmM3EztojTS9F@lore-desk--annotate>
2021-12-04  0:55 ` sean.wang
2021-12-04  0:55   ` sean.wang
2021-12-06 13:05   ` Sven Eckelmann
2021-12-06 13:05     ` Sven Eckelmann
2021-12-16 21:13     ` Lorenzo Bianconi
2021-12-16 21:13       ` Lorenzo Bianconi
2021-12-17  7:38       ` Sven Eckelmann
2021-12-17  7:38         ` Sven Eckelmann
2022-01-11 10:53       ` Sven Eckelmann
2022-01-11 10:53         ` Sven Eckelmann
2022-01-11 11:02         ` Lorenzo Bianconi
2022-01-11 11:02           ` Lorenzo Bianconi

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