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Captive portal login page does not automatically open on some WiFi networks #13901

Description

@sudo-muneeb

Description

On WiFi networks that require web-based authentication (captive portals), Linux Mint does not automatically detect the captive portal or open the login page.

The system connects to the WiFi network successfully, but the browser redirect/login page does not appear, and no notification or button is provided to open it.

In my case, I was eventually able to find the URL that the WiFi network wanted to redirect me to after a colleague of mine, who was using Windows, accessed the captive portal and I was able to get the link from there. I signed in on the website and the network worked like any normal network.

I searched for about half an hour to report this to the correct upstream repository and found that the issue is most likely related to NetworkManager:

https://gitlab.freedesktop.org/NetworkManager/NetworkManager

However, GitLab is currently not accepting new account signups, so I am reporting it here instead.

Could you please confirm whether this is the correct component and repository for this issue? If it belongs upstream, I would appreciate it if you could point me to the appropriate place or forward the report if possible.

I am happy to provide any additional information, or answer any questions that may help investigate the issue.

Environment

Linux Mint: 22.3 Cinnamon

Cinnamon: 6.6.7

NetworkManager: 1.46.0-1ubuntu2.7

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