I had to hand build Linux 3.10 kernel due to this bug, and this system is now in production.
"Package openvswitch not installed and no hook available, ignoring" root@kvm:~# dpkg -l | grep -i openvswitch ii openvswitch-common 2.0.1+git20140120-0ubuntu2 amd64 Open vSwitch common components ii openvswitch-switch 2.0.1+git20140120-0ubuntu2 amd64 Open vSwitch switch implementations ** Changed in: linux (Ubuntu) Status: Incomplete => Opinion ** Changed in: linux (Ubuntu) Status: Opinion => Confirmed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1335292 Title: TCP does not work properly with virtio-net and tx/rx offloading is on Status in “linux” package in Ubuntu: Confirmed Status in “openvswitch” package in Ubuntu: New Bug description: Description: Ubuntu 14.04 LTS Release: 14.04 linux-image-generic: Installed: 3.13.0.30.36 Candidate: 3.13.0.30.36 Version table: *** 3.13.0.30.36 0 500 http://ca.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages 100 /var/lib/dpkg/status 3.13.0.24.28 0 500 http://ca.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages Please see Debian Bug Report, this issue exists in the latest kernel. You cannot pass traffic between virtio enabled guests: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=738863 Thank you. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1335292/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp