The test requested in comment #3 was only to see if the bug is fixes in the current mainline kernel. If this is a production machine, we would not want to put a development kernel on it.
The current linux-lts-wily kernel is a few versions ahead of what you posted in comment #4. It might be good to apply the latest updates to see if the latest hwe kernel exhibits the bug. The current linux-ltx- wily kernel is as follows: linux-lts-wily | 4.2.0-27.32~14.04.1 | trusty-security | source linux-lts-wily | 4.2.0-27.32~14.04.1 | trusty-updates | source linux-lts-wily | 4.2.0-29.34~14.04.1 | trusty-proposed | source -- 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/1540405 Title: i40e fails virtual networking Status in linux package in Ubuntu: Incomplete Bug description: With linux-hwe-generic-trusty we see kern.log entries for "TX driver issue detected, PF reset issued" on a NIC in a bond, followed by the same interface going down and up again. After this time networking to virtual machines bridged to that bond fails. We see either asymmetric traffic, with ARP replies not reaching the VMs, or no traffic at all to or from VMs. In this context, these are nova-compute nodes using OpenvSwitch and KVM. Reloading the i40e module corrects the networking. Setting TCP Segmentation Offload off on the NICs seems to prevent the PF reset, and we don't believe we have seen VM networking problems since doing so. # ethtool -i eth5 driver: i40e version: 1.3.4-k firmware-version: f4.33.31377 a1.2 n4.41 e1866 bus-info: 0000:04:00.1 supports-statistics: yes supports-test: yes supports-eeprom-access: yes supports-register-dump: yes supports-priv-flags: yes To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1540405/+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