In System Settings->Mouse & Touchpad, the Touchpad slider was set to off.
Moving the Touchpad slider to on fixed the problem.
So this is NOT a linux kernel problem, but I think this must have been some sort of upgrade problem - maybe that slider is new and defaults to off - I don't know.
Please triage appropriately - I think there is a bug in that maybe it defaulted/set the slider to off.
Just found a fix for this ...
In System Settings->Mouse & Touchpad, the Touchpad slider was set to off.
Moving the Touchpad slider to on fixed the problem.
So this is NOT a linux kernel problem, but I think this must have been some sort of upgrade problem - maybe that slider is new and defaults to off - I don't know.
Please triage appropriately - I think there is a bug in that maybe it defaulted/set the slider to off.
Thanks,
Barnabear.