id = 675
title = "Attaching WinDbg to a Windows guest on Windows host causes hang"
state = "opened"
created_at = "2021-10-18T00:44:15.619Z"
closed_at = "n/a"
labels = ["hostos: Windows"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/675"
host-os = "Windows 10 21H1"
host-arch = "x86"
qemu-version = "QEMU emulator version 6.1.0 (v6.1.0-11882-g7deea770bf-dirty)"
guest-os = "Windows XP"
guest-arch = "x86"
description = """Attempting to attach WinDbg to a Windows guest on a Windows host causes qemu to lockup while using real serial ports. This has been an issue for some time (years if I'm remembering correctly) I just haven't reported it."""
reproduce = """1. Enable debug in Windows guest
2. Create a DB9 between 2 COM ports
3. Power guest
4. Attach WinDbg to 2nd COM port not in use by the guest"""
additional = """"""