I have a CM-8 running f/w v1.6.5 that will not save any configuration changes or firmware upgrades. Every config change I attempt responds with “Failed to save changes” regardless if I use save_to_flash or save_and_apply. Apply_changes always responds “there is nothing to be applied.” Config changes are never persistent across reboot.
Firmware upgrade attempts always report success, but on reboot it reverts to 1.6.5 and the default config values.
Tried replacing the battery, but that had no effect either.