Upgrade from 16.04 to 17.04 Problem

HI I am using Lenovo Thikpad Yoga 15 i7 5th Gen and 16 GB Ram, i have installed Ubuntu 16.04 Successfully and working fine but when i update to 17.04 . from the login screen my keypad doesnt work . and when i log in using on screen keyboard i can see only black screen with moving mouse .

Please Help

I’ve moved this to the https://community.ubuntu.com/c/support-help-requests category because this site isn’t designed to take tech support questions. Sorry. I’d recommend using one of the official support channels listed on the Finding Help page.