After the investigation and analysis of the ethernet malfunction issue, we found that there is a problem with the configuration in this project (0023-dts-pmu_io_domain-set-wifi-to-3.3v.patch). This incorrect voltage domain configuration can damage the IO ports of the RV1126（RV1109） during use, preventing them from outputting proper voltage or data waveforms. This hardware damage issue has been verified and confirmed on the faulty devices received. Rockchip’s official response also indicates that such a misconfiguration carries the risk of causing this damage - as clearly warned in the official Datasheet, advising users to avoid incorrect voltage domain parameters to prevent irreversible hardware damage. Once the IO ports are damaged, they can no longer communicate normally with the external Ethernet chip, which results in the failure of your Ethernet functionality. Even if you switch back to the native system at this point, your hardware has already been damaged by running the system with the incorrect voltage configuration. We have asked @darkxst to correct the pmu_io_domains Ethernet configuration ASAP.
For all the iHost users who would like to run the Home Assistant OS on iHost, please note this potential risk, do not run Home Assistant OS on iHost until this configuration has been corrected to avoid the Ethernet malfunction and hardware damage risk.