Macbook pro 2010 keyboard stopped working, what to do?

Question

ubuntu

Hello. The macbook has lubuntu, windows 7 and macOS installed. Yesterday the keyboard worked on Lubuntu. Today I open the laptop, I hear that it is working, but the screen is black. I decided that he glitched and turned off through the button. When I re-booted into lubuntu, everything works except the keyboard, so I can't log in. I checked the keyboard in refind, Windows and Macos, the keyboard works everywhere. I connected a USB keyboard, it works everywhere except lubuntu. How can I fix this without reinstalling the system?