resolv.conf auto reset by dnsmasq after install libvirt-bin

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http://askubuntu.com – after I install libvirt-bin and ubuntu-virt-server etc, my resolv.conf auto reset by dnsmasq about every hour I haven't install network-manager and resolvconf and I search for dnsmasq, only dnsmasq-base have been installed. when I try to remove dnsmasq-base, libvirt-bin will be removed automatically how to keep dns config not be changed? I use ubuntu 11.10 thanks for every reply. edit: $ dpkg --list | grep dnsmasq $ ii dnsmasq-base 2.57-1ubuntu1 A small caching DNS proxy and DHCP/TFTP server $ pgrep dnsmasq 1088 in my syslog file: dnsmasq[1088]: reading /etc/resolv.conf dn (HowTos)