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Subject: [Bug 200468] emulators/virtualbox-ose:  hangs when using nmdm as
 serial device
Date: Tue, 26 May 2015 18:38:57 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=200468

            Bug ID: 200468
           Summary: emulators/virtualbox-ose:  hangs when using nmdm as
                    serial device
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: vbox@FreeBSD.org
          Reporter: olgeni@FreeBSD.org
          Assignee: vbox@FreeBSD.org
             Flags: maintainer-feedback?(vbox@FreeBSD.org)

Created attachment 157176
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=157176&action=edit
Serial device fix

When using nmdm(4) as a serial device, a VirtualBox VM will not start until the
corresponding nmdm(4) peer device is open.

For example, if you configure a test_vm like this:

  VBoxManage modifyvm test_vm --uart1 0x3F8 4 --uartmode1 /dev/nmdm0A

it will hang at boot forever until /dev/nmdm0B is accessed.

It possibly happens on actual serial devices too, but I don't have one to test.

This case is already handled for Linux so we just have to expand the check to
cover FreeBSD too.

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