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[Bug 1729674] Re: TB16 dock ethernet corrupts data with hw checksum silently failing

To: group.of.nepali.translators@xxxxxxxxxxxxxxxxxxx
From: Yuan-Chen Cheng <1729674@xxxxxxxxxxxxxxxxxx>
Date: Wed, 13 Jul 2022 02:45:26 -0000
Reply-to: Bug 1729674 <1729674@xxxxxxxxxxxxxxxxxx>
Sender: noreply@xxxxxxxxxxxxx

** Changed in: dell-sputnik
       Status: Triaged => Fix Released

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https://bugs.launchpad.net/bugs/1729674

Title:
  TB16 dock ethernet corrupts data with hw checksum silently failing

Status in Dell Sputnik:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released
Status in linux source package in Artful:
  Fix Released
Status in linux source package in Bionic:
  Fix Released
Status in linux package in Fedora:
  Confirmed

Bug description:
  It looks like TCP  rx and tx checksum offloading is broken on the TB16 dock's ethernet adapter. For example downloading a large file such as the Ubuntu ISO, and then running an md5sum on it yields the incorrect md5sum.  This is because
  rx-checksumming: on
  tx-checksumming: on
  and both set to on by default.

  Running sudo ethtool -K <TB16 eth device> tx off rx off, allows the
  download to complete correctly.  This is very bad since this can cause
  very bad untrustworthy behavior.

  This was conducted using an Dell Precision 5520 on Ubuntu 16.04+linux-
  generic-hwe-16.04-edge.

  Thank you

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