Touchpad quit working between kernel 5.8.0-38 and 5.8.0-45

I have a Dell Precision 7300 and the touchpad worked fine with kernel 5.8.0-38, but the update to 5.8.0-45 caused the touchpad to quit working. The same touchpad problem also exists in 5.8.0-44.

When in 5.8.0-45, I can insert a USB mouse and it works fine.

I've been digging around in logs to try to figure out what's going on, but as far as I can tell no device is found.

Have you seen a problem like this? Have you suggestions?