升级到 wheezy apache 后无法启动

我已经从 lenny 升级到 wheezy，现在 apache 无法启动：

# /etc/init.d/apache2 start                                                                                                                                                             
Starting web server: apache2[Wed May 08 19:01:08 2013] [crit] (22)Invalid argument: alloc_listener: failed to get a socket for (null)
Syntax error on line 17 of /etc/apache2/ports.conf:
Listen setup failed
Action 'start' failed.
The Apache error log may have more information.
 failed!

ports.conf 的第 17 行当然是正确的：

# If you just change the port or add more ports here, you will likely also
# have to change the VirtualHost statement in
# /etc/apache2/sites-enabled/000-default
# This is also true if you have upgraded from before 2.2.9-3 (i.e. from
# Debian etch). See /usr/share/doc/apache2.2-common/NEWS.Debian.gz and
# README.Debian.gz

#NameVirtualHost *:80
#Listen 80

<IfModule mod_ssl.c>
    # If you add NameVirtualHost *:443 here, you will also have to change
    # the VirtualHost statement in /etc/apache2/sites-available/default-ssl
    # to <VirtualHost *:443>
    # Server Name Indication for SSL named virtual hosts is currently not
    # supported by MSIE on Windows XP.
    Listen 443
</IfModule>

<IfModule mod_gnutls.c>
    Listen 443
</IfModule>

看起来它与我正在运行的内核中不存在的一些内核调用有关：http: //major.io/2009/08/14/fedora-11-httpd-alloc_listener-failed-to-get-a-socket -for-null/

这是一个xen VPS，内核版本是2.6.26-amd64。我现在无法更新内核，因为提供商需要做一部分。我已经发送了请求，但我不知道他们需要多长时间。

在我有机会更新内核之前，有没有办法让它工作？