[Qemu-devel] [Bug 1196498] [NEW] Failed to create COM port in Windows Guest VM

[Venkatesh Petla]

Public bug reported:

Hi,

Tried to establish virtual serial connection between two Windows Guest
VMs(Windows 2008 Server).

As it mentioned under the link,
http://www.linux-kvm.org/page/WindowsGuestDrivers/UpdatedGuestDebugging

Started VM using the below command with serial device as TCP port.
# qemu-system-x86_64 -smp 1 -enable-kvm -m 512 -boot c -serial 
tcp:127.0.0.1:50001,server,nowait -hda 
/mnt/sda5/var/lib/libvirt/images/win2008host.img

And started WinDbg in the Windows VM, with serial port:COM1 and
Baudrate:115200.

It throws the error "Could not start kernel debugging using
com:port:COM1,baudrate:115200 parameters, Win32 error 0n2. The system
cannot find the file specified."

Checked under Device Manager and there is no COM1 port.
Does the -serial tcp:127.0.0.01:50001 creates COM1 port? I doubt.
If no what are the parameters I should pass to WinDbg for serial port?

Please help me how to solve this issue.

Thanks
Venkatesh

** Affects: qemu
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1196498

Title:
  Failed to create COM port in Windows Guest VM

Status in QEMU:
  New

Bug description:
  Hi,

  Tried to establish virtual serial connection between two Windows Guest
  VMs(Windows 2008 Server).

  As it mentioned under the link,
  http://www.linux-kvm.org/page/WindowsGuestDrivers/UpdatedGuestDebugging

  Started VM using the below command with serial device as TCP port.
  # qemu-system-x86_64 -smp 1 -enable-kvm -m 512 -boot c -serial 
tcp:127.0.0.1:50001,server,nowait -hda 
/mnt/sda5/var/lib/libvirt/images/win2008host.img

  And started WinDbg in the Windows VM, with serial port:COM1 and
  Baudrate:115200.

  It throws the error "Could not start kernel debugging using
  com:port:COM1,baudrate:115200 parameters, Win32 error 0n2. The system
  cannot find the file specified."

  Checked under Device Manager and there is no COM1 port.
  Does the -serial tcp:127.0.0.01:50001 creates COM1 port? I doubt.
  If no what are the parameters I should pass to WinDbg for serial port?

  Please help me how to solve this issue.

  Thanks
  Venkatesh

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1196498/+subscriptions