wait_device_timeout
Description:
Timeout in milliseconds to wait for device at startup.
During boot, devices may take a while to be detected by the driver. This property will cause to delay NetworkManager-wait-online.service and nm-online to give the device a chance to appear. This works by waiting for the given timeout until a compatible device for the profile is available and managed.
The value 0 means no wait time. The default value is -1, which currently has the same meaning as no wait time.