[SOLVED] Logitech trackpad stopped working today

[bradleypariah]

I own a Logitech k830 (pictured below)

Up until today, I was able to tap on the trackpad for a left-click, and I was able to two-finger tap for a right-click.
Now tapping does absolutely nothing.
I followed the advice here, but it did nothing: https://askubuntu.com/questions/1184...-19-10-upgrade
I found another thread that someone suggested booting into an older kernel, but that didn't help me (the latest on my machine is 5.8.0-53, and I tried to go back to 5.8.0-48).
I downloaded "Synaptics Mouse & Touchpad" from Discover, but that did nothing.

What's weird is that two-finger scrolling still works.
The touch pad still moves the cursor, I simply have to use the physical buttons on the keyboard to click/right-click.
Why would tapping just break?

[bradleypariah]

Oh, wow. Never mind, everyone.
I was unaware that tap-to-click could be disabled by the hardware. Apparently if you hold down FN, and click the physical left-click button, it turns tapping on/off.
I have no idea when I could have done that, but I should have checked the manual before blaming Kubuntu.

https://www.logitech.com/en-au/manuals/11927