Pinebook Pro password fail

Hello,

I have Pinebook Pro with Kali 2020.1 for ARM. kali/kali logs in for a while and I decided that I should change my password to a more secure one. So, I used command "passwd" And I changed it > "Your password has been successfully changed." and when I log in to terminal for recheck it works fine. But when I restarted it, I couldn't log in. Password is too easy. I couldn't forget him. I've tried to find tips on Google but most count the grub and Pinebook Pro doesn't have it.

Thank you in advance for any answers.

PS: Sorry for my english.