SCR128294 wrote:Are they however USB serial ports on the host?
I'm not entirely sure what you mean on this one, they are usb 2.0 ports on the host
Now you have
me wondering what
you mean!
Back in the day there used to be COM ports (UARTs) on the motherboard of every PC, directly connected to the IO ports of the CPU. In recent years the tendency has been to remove them, especially in smaller PCs such as notebooks, and rely on users who need them to buy USB-RS232 adapters.
There has been a parallel tendency to move all legacy hardware with specialist interfacing onto the USB bus, for neatness and to free up interrupt and I/O ports. You'd have a traditional USB serial connector on the outside of the case, but inside the case there's a USB-RS232 adapter.
So my question was: is your host serial port native, legacy, a discrete UART on the motherboard, or is it one of the USB options? Because either one of the latter would be upset by misconfiguring the USB options inside the VM.
I guess there's another way to find out: disable USB support entirely in your VM.