After login keyboard doesnt work
So i have a Macbook air with OS catalina version 10.15.6 and everything is up to date as far as i know. I bought this macbook new in 2017. I never had any issues until one day i logged in and my keyboard just didnt work. I tried to reboot it and when I went to login in everything works. When i hit enter and login however, the keyboard ceases to work. This is my problem, every key works before I login, then stops working after i login. Ive tried numerous suggestions and none have fixed the problem. I have to use a usb keyboard and that just plain sucks, especially when you login using the macbook keyboard and then have to use the usb keyboard once logged in. whats the issue? whats the fix. is there someway to diagnose the issue. I just dont get how it could work before login then not work after login what gives
MacBook Air 13″, macOS 10.15