Hello.
I have DQ67EP with Intel AMT technology.
And activate SOL (serial on line).
When in my system appear ttyS4 device.
dmesg | grep ttyS
 [    1.211649] 0000:00:16.3: ttyS4 at I/O 0xf0e0 (irq = 17) is a 16550A

On boot in grub command line i enter the command :
> serial --port=0xf0e0
but receive the error:
"Unknown serial port".
Please help me configure grub for using SOL.
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