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Sender: Larry Finger <larry.finger@gmail.com>
Message-ID: <0529ba07-db97-fe95-4ab8-aba47b8b0bc4@lwfinger.net>
Date:   Fri, 28 Apr 2023 14:28:23 -0500
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Subject: Re: rtw88: 8822cu (LM842) --> LOWER_UP link messages
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To:     Gabriel Tisan <gabriel.tisan@gmail.com>,
        linux-wireless@vger.kernel.org
References: <CAD9ZU8BcYM_zZqFzTBFDQOoF0Jd3vNj4OWODOy+UZbWXCUwA7A@mail.gmail.com>
From:   Larry Finger <Larry.Finger@lwfinger.net>
In-Reply-To: <CAD9ZU8BcYM_zZqFzTBFDQOoF0Jd3vNj4OWODOy+UZbWXCUwA7A@mail.gmail.com>
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On 4/28/23 08:56, Gabriel Tisan wrote:
> Hi !
> 
> I use a LM842 wifi stick on a Linux kernel 5.15 with last patches for
> rtw88 from linux-next applied.
> Firmware version is 9.9.15
> 
> When I connect LM842 as a station to an AP, after the link is up first
> time, it comes from time to time more LOWER_UP message.
> The stick is plugged and the connection to AP is still valid.
> 
> # ip -oneline -family inet monitor link
> 
> 5: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noqueue state DOWN
> group default \    link/ether 34:c9:f0:99:b6:a1 brd ff:ff:ff:ff:ff:ff
> 
> 5: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
> state DOWN group default \    link/ether 34:c9:f0:99:b6:a1 brd
> ff:ff:ff:ff:ff:ff
> 
> 5: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
> state DOWN group default \    link/ether 34:c9:f0:99:b6:a1 brd
> ff:ff:ff:ff:ff:ff
> 
> 5: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> \    link/ether
> 
> 5: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
> noqueue state DORMANT group default \    link/ether 34:c9:f0:99:b6:a1
> brd ff:ff:ff:ff:ff:ff
> 
> 5: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP,LOWER_UP> \    link/ether
> 
> 5: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP,LOWER_UP> \    link/ether
> 
> 5: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP,LOWER_UP> \    link/ether
> 
> 5: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
> state UP group default \    link/ether 34:c9:f0:99:b6:a1 brd
> ff:ff:ff:ff:ff:ff
> 
> 
> 
> 5: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> \    link/ether
> 
> 5: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> \    link/ether
> 
> 5: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> \    link/ether
> 
> 5: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> \    link/ether
> 
> 5: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> \    link/ether
> 
> 5: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> \    link/ether
> 
> 
> 
> 
> 
> Any idea what I can do ?
> 
> Did someone also reproduce that problem ?

No, I do not see that problem. When I run your command, I get

finger@localhost:~/rtw88>ip -oneline -family inet monitor link
12: wlp0s20u6i2: <BROADCAST,MULTICAST,UP,LOWER_UP> \    link/ether
12: wlp0s20u6i2: <BROADCAST,MULTICAST,UP,LOWER_UP> \    link/ether
12: wlp0s20u6i2: <BROADCAST,MULTICAST,UP,LOWER_UP> \    link/ether

My connection is very stable; however, my device is an 8822BU, not an 8822CU.

When the connection is dropped, what is logged? You can see that with a 'sudo 
dmesg | less' command.

Larry