安装了 acpi 的 KVM 来宾不会关闭

我已经安装了 KVM，并在我的 Debian 7.1 主机上运行，​​其中有两个 Debian 7.1 来宾和一些 Windows XP 来宾。当我使用命令 'virsh shutdown' 关闭或点击 virt-manager 中的关闭按钮时，Debian 来宾进入 pmsuspended 状态。

我可以正确关闭的唯一方法是通过 ssh 连接到这些客人并输入“shutdown -h now”命令。

在两个 debian 客户机上，我都安装并运行了这些软件包：

ii  acpi                                  1.6-1                              amd64        displays information on ACPI devices
ii  acpi-fakekey                          0.140-5                            amd64        tool to generate fake key events
ii  acpi-support                          0.140-5                            all          scripts for handling many ACPI events
ii  acpi-support-base                     0.140-5                            all          scripts for handling base ACPI events such as the power button
ii  acpid                                 1:2.0.16-1+deb7u1                  amd64        Advanced Configuration and Power Interface event daemon

这是我的 acpid 在我的 debian 客户机上的事件：

:/etc/acpi/events$ cat powerbtn-acpi-support 
event=button[ /]power
action=/etc/acpi/powerbtn-acpi-support.sh

/etc/acpi/powerbtn-acpi-support.sh

#!/bin/sh

# This script initiates a shutdown when the power putton has been
# pressed. Loosely based on the sample that ships with the acpid package.
# If the acpid sample is present as a real config file (as it was in earlier
# versions of acpid), we skip this script. (Purging and reinstalling acpid
# resolves this situation, or simply deleting /etc/acpi/events/powerbtn.)

if [ -f /etc/acpi/events/powerbtn -o -f /etc/acpi/events/powerbtn.dpkg-bak ] ; then 
    logger Acpi-support not handling power button, acpid handler exists at /etc/acpi/events/powerbtn or /etc/acpi/events/powerbtn.dpkg-bak.
    exit 0
fi

[ -e /usr/share/acpi-support/policy-funcs ] || exit 0

. /usr/share/acpi-support/policy-funcs

if CheckPolicy; then
    exit 0
fi

if [ -x /etc/acpi/powerbtn.sh ] ; then
    # Compatibility with old config script from acpid package
    /etc/acpi/powerbtn.sh
elif [ -x /etc/acpi/powerbtn.sh.dpkg-bak ] ; then
        # Compatibility with old config script from acpid package
    # which is still around because it was changed by the admin
        /etc/acpi/powerbtn.sh.dpkg-bak
else
    # Normal handling.
    /sbin/shutdown -h -P now "Power button pressed"
fi

更新

上周安装了一个新的 Debian 来宾 VM，它没有关机问题。确实存在问题的 Debian VM 已从 VirtualBox 移至 KVM，并且是 Debian 7 的较旧安装。