I had a Bullet M2 with SECN 2.0RC1, and I used the sysupgrade image to upgrade to RC3. I chose to "keep current settings". batman-adv did not start after upgrade. The "Enable Mesh" checkbox on the web gui could be set and saved, but after a reboot, the checkbox was still unset and batman-adv was not operational. I edited the config file to try to enable it there, but this was also unsuccessful. - I re-upgraded with the same sysupgrade image, but chose not to keep settings. This was successful , and batman-adv was enabled.
Sounds like there is a batman-adv setting that is not being captured in /etc/config We'll have to do a before and after comparison of the upgraded config files
I had a Bullet M2 with SECN 2.0RC1, and I used the sysupgrade image to upgrade to RC3. I chose to "keep current settings". batman-adv did not start after upgrade. The "Enable Mesh" checkbox on the web gui could be set and saved, but after a reboot, the checkbox was still unset and batman-adv was not operational. I edited the config file to try to enable it there, but this was also unsuccessful. - I re-upgraded with the same sysupgrade image, but chose not to keep settings. This was successful , and batman-adv was enabled.