Hi there, I'm hitting the same bug with an explanation there : http://www.spinics.net/lists/kvm/msg42207.html
libvirt "faulty" change : http://libvirt.org/git/?p=libvirt.git;a=commitdiff;h=fd5b15ff1a2ec37e75609c091522ae1e2c74c811 and a quick way to test issue: # /sbin/iptables --table mangle -A POSTROUTING --out-interface virbr0 --protocol udp --destination-port 68 --jump CHECKSUM iptables v1.4.4: Couldn't load target `CHECKSUM':/lib/xtables/libipt_CHECKSUM.so: cannot open shared object file: No such file or directory -------- Work around ..... .... Downgrade libvirt to 0.8.2 should let us use kvm with virt-manager .... ------------------- Extra Infos ------------------- ------ Missing lib there: # ls /lib/xtables/ libip6t_ah.so libipt_CLUSTERIP.so libipt_SNAT.so libxt_dscp.so libxt_owner.so libxt_tcpmss.so libip6t_dst.so libipt_DNAT.so libipt_ttl.so libxt_DSCP.so libxt_physdev.so libxt_TCPMSS.so libip6t_eui64.so libipt_ecn.so libipt_TTL.so libxt_esp.so libxt_pkttype.so libxt_TCPOPTSTRIP.so libip6t_frag.so libipt_ECN.so libipt_ULOG.so libxt_hashlimit.so libxt_policy.so libxt_tcp.so libip6t_hbh.so libipt_icmp.so libipt_unclean.so libxt_helper.so libxt_quota.so libxt_time.so libip6t_hl.so libipt_LOG.so libxt_CLASSIFY.so libxt_iprange.so libxt_rateest.so libxt_tos.so libip6t_HL.so libipt_MASQUERADE.so libxt_cluster.so libxt_length.so libxt_RATEEST.so libxt_TOS.so libip6t_icmp6.so libipt_MIRROR.so libxt_comment.so libxt_limit.so libxt_recent.so libxt_TPROXY.so libip6t_ipv6header.so libipt_NETMAP.so libxt_connbytes.so libxt_mac.so libxt_sctp.so libxt_TRACE.so libip6t_LOG.so libipt_realm.so libxt_connlimit.so libxt_mark.so libxt_SECMARK.so libxt_u32.so libip6t_mh.so libipt_REDIRECT.so libxt_connmark.so libxt_MARK.so libxt_socket.so libxt_udp.so libip6t_REJECT.so libipt_REJECT.so libxt_CONNMARK.so libxt_multiport.so libxt_standard.so libip6t_rt.so libipt_SAME.so libxt_CONNSECMARK.so libxt_NFLOG.so libxt_state.so libipt_addrtype.so libipt_set.so libxt_conntrack.so libxt_NFQUEUE.so libxt_statistic.so libipt_ah.so libipt_SET.so libxt_dccp.so libxt_NOTRACK.so libxt_string.so --------- Kervel version # uname -a Linux ben-desktop 2.6.35-23-generic #36-Ubuntu SMP Tue Oct 26 17:13:06 UTC 2010 x86_64 GNU/Linux -------- KVM version # kvm --version QEMU PC emulator version 0.12.5 (qemu-kvm-0.12.5), Copyright (c) 2003-2008 Fabrice Bellard ------- libvirt version # libvirtd --version libvirtd (libvirt) 0.8.3 ------- virt-manager version # virt-manager --version 0.8.4 -- libvirt default network doesn't start, iptables errors, bad rules https://bugs.launchpad.net/bugs/668043 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs