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Earlier today I was trying to connect to an enterprise network based on MAC address. My laptop was registered in the network, but it wasn't connecting to it specifically. It still connected to other networks

After a while, I tried to forget the network to start from scratch. It didn't work. Now every time I click on the network in the settings panel the wifi tag disappears for a while and I can't connect. After restarting, the same thing started to happen to all other networks I could try. USB tethering didn't work either. Also it seems a VPN that used to be configured disappeared.

I'm currently typing this on my cell phone and I don't have access to a booting device. What should I do to restore full functionality?

I think I was trying to manually edit the connection and input a few BSSIDs without knowing what I was doing. I cannot edit any of that now. Could this be the root of all evil?

Results of ip -br link show :

lo        UNKNOWN 00:00:00:00:00:00      <LOOPBACK,UP,LOWER_UP>
wlp0s20f3 DOWN    [MAC address redacted] <NO-CARRIER,BROADCAST,MULTICAST,UP>

Using sudo ip link set wlp0s20f3 up was not useful.

karel
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Níckolas Alves
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1 Answers1

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Since I had no internet available at the time of posting, I could not copy the full messages from the terminal. However, what did the trick was the command sudo journalctl -b 0 -u NetworkManager suggested in the comments. It brought my attention to the fact that the network I had deleted had a configuration with the MAC address set to a "stable ssid" instead of the correct MAC address in the form XX:XX:XX:XX:XX:XX. This was an issue in some .yml file with a long and strange name. I opened the file with sudo nano path-to-file.yml and edited out the relevant lines. After rebooting, internet was working fine.

Níckolas Alves
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