Thinkpad Carbon X1 2019 (gen7) Wi-Fi on Ubuntu 18.04

Question

Hardware: Lenovo Thinkpad Carbon X1 2019, using an Intel AC 9560 wireless module

Upon installing Ubuntu 18.04, I discovered that my Wi-Fi worked while installing Ubuntu, but did not after I restarted. It turns out that this problem occurs during the update process. Turns out it was the kernel! Worked on 5.3.0-28 but broken on 5.3.0-40

Specifically, you know you have the problem I experienced if you see the following behavior:

-The Wi-Fi settings page indicates that it cannot find a wireless module.

-You were able to see Wi-Fi networks while installing Ubuntu

-If you reboot Ubuntu using "Advanced Options for Ubuntu" at the startup screen and select an older kernel version (not recovery mode), your wireless works again

Answer 1

Solved problem by removing the offending updated kernel (sudo apt purge linux-image-5.3.0-40-generic) and swearing not to update my kernel in the future (judge me, I know!)

If someone wants to dig in and try to solve the issue in a more graceful way, then have at it! This is satisfactory for me.

Other possibly relevant links:

• Cannot detect wireless driver intel ac wireless 9560 [logs included]

• Intel Wireless-AC 9560 WiFi not working in Ubuntu 16.04

• https://certification.ubuntu.com/hardware/201904-26993

• driver intel ac wireless 9560 Ubuntu 18

• https://ubuntuforums.org/showthread.php?t=2400595

• WiFi on ASUS ROG GX501 works with Ubuntu 18.04, fails on Ubuntu 16.04 (Intel Wireless AC 9560)

^{This answer was originally posted by Ryan Monroe inside the question.}