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Re: Tablet refuses to connect to an AP that it knows

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On 2026-09-08, Carlos E.R. wrote:

> On 2026-09-08 03:50, Maria Sophia wrote:
>> Carlos E.R. wrote:
>
>
>> The interesting clues are that the Linux machines and Motorola phones
>> connect normally, another identical Lenovo tablet has the same problem, and
>> forgetting the WiFi network and adding it again fixes the problem.
>>
>> Since you just factory reset the router, I would check the WiFi security
>> settings. In particular, see whether it is now using WPA2/WPA3 mixed mode
>> instead of WPA2-Personal/AES, whether WPA3 is enabled, or whether
>> PMF/802.11w is set to required.
>
> That's an interesting idea.
>
> The security is at default settings, WPA2-PSK-AES, and is greyed
> out. To change it, I have to get into the advanced setting pages. The
> page in question is not familiar, I did not touch those settings
> previously.
>
> Alternatives are
>
>   Open/EnhancedOpen Open&OWE - warning: disables easy mesh
>   EnhancedOpen Open&OWE - warning: disables easy mesh
>   WPA2/WPA3 PSK&SAE - warning: not all repeaters/extender are compatible
>   WPA3 SAE - Warning: make sure your devices support it.
>
> The only one I might have been tempted to try of those is the third
> one. I enabled it now, the tablet is still complaining.
>
>
> No, I don't worry about it at all, I'm just curious, because it is a
> nuisance to have to reenter the credentials.
>
>
> My guess is that the BSSID changed, but the router config doesn't
> report it. It is mentioned somewhere as MAC, though
>
> Ah, found it, for 2.4Ghz. It is not the same as reported by my Linux
> laptop in that room, there is one digit difference. Not configurable.
>
> Ah, there is one for 2.4G and another for 5G, they differ in the last
> digit. It matches the laptop info for 5GHz, I did not know that old
> laptop had the 5Gh band.
>
>
> Bingo! It changed. This command finds the change:
>
> Legolas:~ # grep "wlan1: authenticate with" /var/log/messages
>
>
> <0.6> 2026-09-07 12:05:12 Legolas kernel - - - [ T1159] wlan1:
> authenticate with 70:8b:... (local address=a0:d3:7a:...)
> <0.6> 2026-09-07 12:26:22 Legolas kernel - - - [ T1159] wlan1:
> authenticate with 90:d3:... (local address=a0:d3:7a:...)
>
>
> So, one more tidbit for you: my router changes the BSSID on factory
> reset, so it can not be tracked across different owners. :-)

Any chance it has a setting to offer separate WLANs on 5 GHz and 2.4
GHz, and that this setting now is set to show two "separate" APs?

-- 
Nuno Silva

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Thread

Tablet refuses to connect to an AP that it knows "Carlos E.R." <robin_listas@es.invalid> - 2026-09-07 19:42 +0200
  Re: Tablet refuses to connect to an AP that it knows Maria Sophia <mariasophia@comprehension.com> - 2026-09-08 04:50 +0300
    Re: Tablet refuses to connect to an AP that it knows "Carlos E.R." <robin_listas@es.invalid> - 2026-09-08 09:41 +0200
      Re: Tablet refuses to connect to an AP that it knows Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-08 09:51 +0100
        Re: Tablet refuses to connect to an AP that it knows "Carlos E.R." <robin_listas@es.invalid> - 2026-09-08 11:51 +0200
      Re: Tablet refuses to connect to an AP that it knows "Carlos E.R." <robin_listas@es.invalid> - 2026-09-08 12:45 +0200
      Re: Tablet refuses to connect to an AP that it knows Maria Sophia <mariasophia@comprehension.com> - 2026-09-08 19:02 +0300
        Re: Tablet refuses to connect to an AP that it knows "Carlos E.R." <robin_listas@es.invalid> - 2026-09-08 18:54 +0200
          Re: Tablet refuses to connect to an AP that it knows Maria Sophia <mariasophia@comprehension.com> - 2026-09-08 21:03 +0400
            Re: Tablet refuses to connect to an AP that it knows Maria Sophia <mariasophia@comprehension.com> - 2026-09-08 21:07 +0400
  Re: Tablet refuses to connect to an AP that it knows Andy Burns <usenet@andyburns.uk> - 2026-09-08 11:51 +0100
    Re: Tablet refuses to connect to an AP that it knows "Carlos E.R." <robin_listas@es.invalid> - 2026-09-08 13:35 +0200
      Re: Tablet refuses to connect to an AP that it knows Andy Burns <usenet@andyburns.uk> - 2026-09-08 13:41 +0100
        Re: Tablet refuses to connect to an AP that it knows Maria Sophia <mariasophia@comprehension.com> - 2026-09-09 20:52 +0430

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