This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
artful' to 'verification-done-artful'. If the problem still exists,
change the tag 'verification-needed-artful' to 'verification-failed-

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

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** Tags added: verification-needed-artful

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  ThunderX: TX failure unless checksum offload disabled

Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Artful:
  Fix Committed

Bug description:
  Most attempts to use IPv6 on the ThunderX NIC will fail.

  [Test Case]
  Attempt an IPv6 TCP connection:

  $ wget -6 ''

  The connection will time out.

  [Regression Risk]
  The fix is upstream, and is limited to the ThunderX nicvf driver.

  Disable TX checksum offload:

  $ ethtool -K eth0 tx off

  [More Details]
  The issue first appears in Linux 4.12.  A fix from Cavium has been merged 

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