BPI-R4PRO-4E-OPENWRT-V24.10.0-Master-Devel: Using stock image `fw_printenv` print errors

Banana Pi Router design BPI-R4/BPI-R4 Pro(MT7988)
1

I am using the factory supplied image, i.e., https://github.com/BPI-SINOVOIP/BPI-R4PRO-4E-OPENWRT-V24.10.0-Master-Devel. I want to be able to adjust the U-Boot args from within Linux itself, however attempting to do so leads to this error when I boot from eMMC:

$ fw_printenv
Cannot parse config file '/etc/fw_env.config': No such file or directory
Failed to find NVMEM device

Claude supplied me with a fix that works:

cat > /etc/fw_env.config <<'EOF'
/dev/mmcblk0    0x400000    0x40000
/dev/mmcblk0    0x440000    0x40000
EOF

Then fw_printenv works.

It also told me to build and include the kmod-ubootenv-nvram module but that made no difference - it still prints out the same error even after installing kmod-ubootenv-nvram.

Questions

  1. Does fw_printenv work for anyone on the stock Banana Pi BPI-R4 Pro 4E image?
  2. Is /etc/fw_env.config simply missing from the stock image?

If someone at Banana Pi or else where could please verify, that would be great.

Thanks,

- Bana