Updating U-Boot to 5.25 on Banana Pi M2+ changes MAC address and CPU serial number

bprinz · May 30, 2017

Hi,

after the update from Armbian 5.23 to 5.25 on a Banana Pi M2+ board, the MAC address and CPU serial number have changed.

This can be reproduced by just updating the u-boot package on Armbian 5.23:

# ifconfig | grep HWaddr
eth0      Link encap:Ethernet  HWaddr da:c7:a0:49:24:d6  

# grep Serial /proc/cpuinfo 
Serial		: 2435501d0a0e4800004d

# dpkg -i linux-u-boot-bananapim2plus_5.25_armhf.deb
# reboot

# ifconfig | grep HWaddr
eth0      Link encap:Ethernet  HWaddr 3a:89:a1:23:98:a6  

# grep Serial /proc/cpuinfo 
Serial		: 24005035871c481d0a0e

Does anyone know the reason for this? Did u-boot change the way these numbers are generated?

Best regards