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Из второй ссылки:
NI wrote:The file .labviewrc contains the LabVIEW configuration options. To set the devices the serial port VIs use, set the configuration option labview.serialDevices to the list of devices you intend to use. For example, the default is:
labview.serialDevices: /dev/ttya:/dev/ttyb:/dev/ttyc:...:/dev/ttyz
Note: This requires that any third party serial board installation include a method of creating a standard /dev file (node) and that the user knows the name of that file.
Linux: Port 0 refers to /dev/ttyS0, Port 1 refers to /dev/ttyS1, Port 2 refers to /dev/ttyS2, and so on.
Да, там такого параметра нет по умолчанию, но никто не мешает его туда внести.