Public bug reported:

If virtio NIC is not used virtserialport works and delivers data written
to /dev/vport0p1 to localhost:4444:

qemu-system-x86_64 -enable-kvm -kernel mykernel -initrd myramdisk
-device virtio-serial -chardev socket,host=localhost,port=4444,id=agent
-device virtserialport,chardev=agent,name=hera.agent -net user -net nic

If using virtio nic, write to /dev/vport0p1 succeeds, but no data is
delivered to localhost:4444:

qemu-system-x86_64 -enable-kvm -kernel mykernel -initrd myramdisk
-device virtio-serial -chardev socket,host=localhost,port=4444,id=agent
-device virtserialport,chardev=agent,name=hera.agent -net user -net
nic,model=virtio

This bug exists in 2.0 release, Debian's QEMU 1.7 package and b3706faf
from git.

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1299566

Title:
  virtio serial doesn't work with virtio nic

Status in QEMU:
  New

Bug description:
  If virtio NIC is not used virtserialport works and delivers data
  written to /dev/vport0p1 to localhost:4444:

  qemu-system-x86_64 -enable-kvm -kernel mykernel -initrd myramdisk
  -device virtio-serial -chardev
  socket,host=localhost,port=4444,id=agent -device
  virtserialport,chardev=agent,name=hera.agent -net user -net nic

  If using virtio nic, write to /dev/vport0p1 succeeds, but no data is
  delivered to localhost:4444:

  qemu-system-x86_64 -enable-kvm -kernel mykernel -initrd myramdisk
  -device virtio-serial -chardev
  socket,host=localhost,port=4444,id=agent -device
  virtserialport,chardev=agent,name=hera.agent -net user -net
  nic,model=virtio

  This bug exists in 2.0 release, Debian's QEMU 1.7 package and b3706faf
  from git.

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