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[Wyman <wymanc@xxxxxxxxx>]

Same here on WIndows 2012 R2
Linux version 3.19.0-43-generic (buildd@lgw01-16) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #49~14.04.1-Ubuntu SMP Thu Dec 31 15:44:49 UTC 2015

errors in kernel log
Jan 14 14:02:23 LibreNMS kernel: [100499.884028] hv_netvsc vmbus_0_15 eth0: unable to send receive completion pkt (tid 483)...retrying 4
Jan 14 14:02:23 LibreNMS kernel: [100499.884410] hv_netvsc vmbus_0_15 eth0: unable to send receive completion pkt (tid 483)...give up retrying
Jan 14 14:02:23 LibreNMS kernel: [100499.884793] hv_netvsc vmbus_0_15 eth0: unable to send receive completion pkt (tid 481)...retrying 1
Jan 14 14:02:23 LibreNMS kernel: [100499.885056] hv_netvsc vmbus_0_15 eth0: unable to send receive completion pkt (tid 481)...retrying 2
Jan 14 14:02:23 LibreNMS kernel: [100499.885307] hv_netvsc vmbus_0_15 eth0: unable to send receive completion pkt (tid 481)...retrying 3
Jan 14 14:02:23 LibreNMS kernel: [100499.885714] hv_netvsc vmbus_0_15 eth0: unable to send receive completion pkt (tid 481)...retrying 4
Jan 14 14:02:23 LibreNMS kernel: [100499.886079] hv_netvsc vmbus_0_15 eth0: unable to send receive completion pkt (tid 481)...give up retrying
Jan 14 14:02:23 LibreNMS kernel: [100499.886463] hv_netvsc vmbus_0_15 eth0: unable to send receive completion pkt (tid 1643)...retrying 1
Jan 14 14:02:23 LibreNMS kernel: [100499.886734] hv_netvsc vmbus_0_15 eth0: unable to send receive completion pkt (tid 1643)...retrying 2
Jan 14 14:02:23 LibreNMS kernel: [100499.886976] hv_netvsc vmbus_0_15 eth0: unable to send receive completion pkt (tid 1643)...retrying 3
Jan 14 14:02:23 LibreNMS kernel: [100499.887418] hv_netvsc vmbus_0_15 eth0: unable to send receive completion pkt (tid 1643)...retrying 4
Jan 14 14:02:23 LibreNMS kernel: [100499.887771] hv_netvsc vmbus_0_15 eth0: unable to send receive completion pkt (tid 1643)...give up retrying
Jan 14 14:02:23 LibreNMS kernel: [100499.888141] hv_netvsc vmbus_0_15 eth0: unable to send receive completion pkt (tid 1644)...retrying 1
Jan 14 14:02:23 LibreNMS kernel: [100499.888569] hv_netvsc vmbus_0_15 eth0: unable to send receive completion pkt (tid 1644)...retrying 2
Jan 14 14:02:23 LibreNMS kernel: [100499.888663] hv_netvsc vmbus_0_15 eth0: unable to send receive completion pkt (tid 1644)...retrying 3
Jan 14 14:02:23 LibreNMS kernel: [100499.889072] hv_netvsc vmbus_0_15 eth0: unable to send receive completion pkt (tid 1644)...retrying 4

The interface seem to still work but it will eventually stop working.

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-lts-vivid in Ubuntu.
https://bugs.launchpad.net/bugs/1505592

Title:
  3.19.0.30 kernel in hyper-v cause hv_netvsc problem

Status in linux-lts-vivid package in Ubuntu:
  Confirmed

Bug description:
  Hi,

  i have a problem, same in https://bugs.launchpad.net/ubuntu/+source/linux-lts-utopic/+bug/1491957
  I think it's not fixed in 3.19 branch. 

  Oct 11 16:18:29 web01 kernel: [797134.247603] hv_netvsc vmbus_0_14 eth1: unable to send receive completion pkt (tid 1990)...retrying 1
  Oct 11 16:18:29 web01 kernel: [797134.247767] hv_netvsc vmbus_0_14 eth1: unable to send receive completion pkt (tid 1990)...retrying 2
  Oct 11 16:18:29 web01 kernel: [797134.247903] hv_netvsc vmbus_0_14 eth1: unable to send receive completion pkt (tid 1990)...retrying 3
  Oct 11 16:18:29 web01 kernel: [797134.248037] hv_netvsc vmbus_0_14 eth1: unable to send receive completion pkt (tid 1990)...retrying 4
  Oct 11 16:18:29 web01 kernel: [797134.248072] hv_netvsc vmbus_0_14 eth1: unable to send receive completion pkt (tid 1990)...give up retrying

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