For what it's worth, this doesn't just affect the X710-TM4 controller.
The X710-T2L card is rendered completely useless by this bug as that
card only has copper 10 GbE ports. As with the X710-TM4, the latest
version of the Intel driver fixes the issue.

Are there plans to release a fixed i40e driver for Focal soon? It looks
like https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1890988 is
another duplicate of this bug as well.

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https://bugs.launchpad.net/bugs/1887703

Title:
  [Regression] 5.4 is not identifying all ports on Intel x710-TM4 10GbE
  controller

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Focal:
  Confirmed

Bug description:
  [IMPACT]

  The Intel x710-TM4 is one of the latest 10GbE controllers from intel
  using the i40e driver.  This particular 4 port comes in a 2x2
  arrangement: 2x SFP+ and 2x RJ-45.  This card is enabled in 5.4 via
  the inbox version of the i40e driver, and hwinfo does show both sides
  of the card but the kernel only sees the two SFP+ ports and cannot
  address or use the two copper ports.

  This is currently blocking certification for one of our hardware
  partners.

  After some investigation we see this works in a more recent version of
  the driver. Intel suggests the commit in FIXES from 5.5 should make
  this work.

  This is a regression from the i40e driver in Bionic (5.3 HWE) that,
  per the tester, does show all four ports.

  [FIXES]

  3df5b9a6a9ec3c1e4431bf1db3426b54dc92dd91 i40e: enable X710 support

  I have a branch here:
  
https://code.launchpad.net/~bladernr/ubuntu/+source/linux/+git/focal/+ref/1887703-i40e-enable-x710

  [TESTING]
  Boot system, verify four ports are visible and can be addressed and pass data.

  [IMPACT]

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