Hi,
I performed an apt-get upgrade on my system, and it installed the 4.13 kernel. After the reboot, i started getting the message "bad CRC - using default environment". I spent the whole day reading many threads but still didn't manage to come with a solution. I tried the symlink to /boot/dtb/allwinner from the PC2 forum, but with no luck. I bought this board recently, it is my first board and i am very new to this, although i have decent Linux knowledge. Could you point out what i might have done wrong or if i'm missing something?