VirtualBox

Ticket #9109 (closed enhancement: fixed)

Opened 5 years ago

Last modified 7 months ago

There are only 2 serial ports available per virtual machine

Reported by: aminm Owned by:
Priority: major Component: other
Version: VirtualBox 4.0.8 Keywords: serial port
Cc: Guest type: Linux
Host type: Windows

Description (last modified by frank) (diff)

It seems that VirtualBox cannot support more than 2 serial ports per virtual machine. This limitation severly hampers the usefulness of VirtualBox for my applications. I run virtualized fax servers that are portable across OSs and connect to external modems through mapped serial ports. For a typical 4 or 8 line fax board, this means I cannot scale the application to fully utilize the available hardware. As far as I know only VMWare supports unlimited serial ports per VM among the competition.

Change History

comment:1 Changed 4 years ago by BusyBoy

Hi Aminm

Did you ever find a solution for this issue with virtualbox

"It seems that VirtualBox cannot support more than 2 serial ports per virtual machine. This limitation severly hampers the usefulness of VirtualBox for my applications. I run virtualized fax servers that are portable across OSs and connect to external modems through mapped serial ports. For a typical 4 or 8 line fax board, this means I cannot scale the application to fully utilize the available hardware. As far as I know only VMWare supports unlimited serial ports per VM among the competition. "

comment:2 Changed 22 months ago by Netika

Hello,

has anyone found any workaround ? I'm using VirtualBox as fax server too, and the only way I found is to install a second virtual machine to connect additionnal modems...

I have modems and can help for testing.

comment:3 Changed 9 months ago by Maxim-Allen Mukhin

Hello, I have stumbled at this limitation in version 5.0.12 (r104815). Likewise need more than 2 serial ports. Using serial ports for microcontroller development.

comment:4 Changed 7 months ago by frank

  • Status changed from new to closed
  • Resolution set to fixed
  • Description modified (diff)

Fix is part of VBox 5.0.16.

comment:5 Changed 7 months ago by AmZaf

The limitation is increased from 2 to 4 ports. I wish it would have increased to 16 to bring it in line with VMware virtual machine spec.

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