Touchpad not working on Linux Ubuntu?

Question

linux

Hello everyone
Recently moved from Windows 10 to Linux Ubuntu 18.04. And for the first forty minutes I worked with the touchpad, then I rebooted and the touchpad just died. Doesn't work at all. I googled found a couple of articles - here is the first , but the second . I did everything right there. But nothing helped. Help who knows what to do
PS the touchpad itself is 100% working

Answer 1

9 out of 10 cases about a non-working touch bar is accidentally turned off by the corresponding key.