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.
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. :-)
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?
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
ÿ Open/EnhancedOpen Open&OWE - warning: disables easy mesh
ÿ EnhancedOpen Open&OWE - warning: disables easy mesh
ÿ WPA2/WPA3 PSK&SAE - warning: not all repeaters/extender are compatible
ÿ 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.
Carlos E.R. wrote:
I recently did a factory reset to the main router of the house. IHas the factory reset changed the to a high wifi channel number that
recreated the AP with the same credentials. My Linux computers connect
fine to it. My Android phones (Motorola G52, G62) connect fine. But
not the Lenovo Tablet (Lenovo Idea Tab 11" (8GB 128GB)).
some devices don't support? (e.g. 13 or 14)
Carlos E.R. wrote:
Pop quiz!
Which three of the following are factory burned BSSIDs, vs randomized?
a. 00:1A:2B:3C:4D:50
b. 40:1A:2B:3C:4D:50
c. 80:1A:2B:3C:4D:50
d. 02:1A:2B:3C:4D:50
e. 46:1A:2B:3C:4D:50
f. 8A:1A:2B:3C:4D:50
HINT: Look at the binary representation of the second character
(check the second-to-last bit, i.e., the Universal/Local flag).
| Sysop: | Jacob Catayoc |
|---|---|
| Location: | Pasay City, Metro Manila, Philippines |
| Users: | 4 |
| Nodes: | 4 (0 / 4) |
| Uptime: | 497099:23:42 |
| Calls: | 182 |
| Files: | 744 |
| D/L today: |
6 files (5,132K bytes) |
| Messages: | 73,551 |