Legacy kernel based images are using improved and updated stock kernel with proprietary boot loader. Sometimes hangs on reboot. Mainline kernel does not support wireless, HDMI, … It is useful for server case scenarios.

Legacy kernel based images are using improved and updated stock kernel with proprietary boot loader. Sometimes hangs on reboot. Mainline kernel does not support wireless, HDMI, … It is useful for server case scenarios.
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More info Powering related troubles are possible since USB Type-C is not PD-compliant Check quick review Enable video and 3D acceleration