"Authentication Required" password request loop on Ubuntu 20.04

[catalysten]

I have a dual-boot laptop (Surface Book 1) that can run both Windows and Ubuntu. Two days ago, on Saturday, everything was working fine. Now, only Windows can connect. On Ubuntu, I can see the wifi network, and I can attempt to connect, but each time it bounces me back to the "Authentication Required" page where I reenter the password.

I've tried restarting the router, turning my computer completely off and on, and verifying (many times) that I'm using the correct password. Elsewhere on this forum, I found a script for posting internet data (https://github.com/UbuntuForums/wireless-info). Perhaps it's still useful! I've attached its output here.

This appears to be a problem specifically between Ubuntu and my Xfinity wifi. When I turn my phone into a hot-spot, it connects just fine.

What can I do to resolve this? (And thanks for taking a look!)

[catalysten]

I figured out what the problem was!


I had updated my linux kernel on Saturday, and that had overwritten my (fairly ancient) special surface-book linux kernel that I got from Jakeday's git repository. To fix the problem, I got the newest, top-of-the-line kernel from here:
https://github.com/linux-surface/linux-surface


I had to make sure to follow both its installation instructions (https://github.com/linux-surface/lin...tion-and-Setup) and sign the kernel using their premade public key & associated instructions (https://github.com/linux-surface/lin...ki/Secure-Boot).


It's so nice to be done with this!