santosmjc

Hi, I installed "Armbian_20.02.7_Tinkerboard_buster_current_5.4.28_minimal" at my tinkerboard and, in order to enable uart 4, I had to rebuild the kernel onboard (from linux-source-current-rockchip_20.02.7_all.deb). The uart 4 came alive but the processor serial number now is missing from cpuinfo (printing 0000000000). How can I bring it up again?