Public bug reported:

SRU justification:

[Impact]
igc driver can not connect to network after re-plugin thunderbolt dock when
MAC passthrough enabled in BIOS.

[Fix]
Wait for the MAC copy of BIOS when enabled MAC passthrough.
Intel engineer wants a different solution and promise to discuss with firmware 
engineer.
Due to the schedule, made this as a short term solution to fix the issue, and 
wait for the other
fix from Intel.

[Test]
Verified on hardware, after hotplug the thunderbolt cable,
Ethernet works fine.

[Where problems could occur]
It may break the igc driver.

** Affects: hwe-next
     Importance: Undecided
         Status: New

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: linux-oem-5.13 (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: linux-oem-5.14 (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: linux-oem-5.13 (Ubuntu Focal)
     Importance: Undecided
         Status: New

** Affects: linux-oem-5.14 (Ubuntu Focal)
     Importance: Undecided
         Status: New

** Affects: linux (Ubuntu Hirsute)
     Importance: Undecided
         Status: New


** Tags: oem-priority originate-from-1942744 originate-from-1942746 sutton

** Also affects: linux (Ubuntu Hirsute)
   Importance: Undecided
       Status: New

** Also affects: linux-oem-5.13 (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: linux-oem-5.14 (Ubuntu)
   Importance: Undecided
       Status: New

** No longer affects: linux-oem-5.13 (Ubuntu Hirsute)

** No longer affects: linux-oem-5.14 (Ubuntu Hirsute)

** Also affects: linux (Ubuntu Focal)
   Importance: Undecided
       Status: New

** Also affects: linux-oem-5.13 (Ubuntu Focal)
   Importance: Undecided
       Status: New

** Also affects: linux-oem-5.14 (Ubuntu Focal)
   Importance: Undecided
       Status: New

** No longer affects: linux (Ubuntu Focal)

** Tags added: oem-priority originate-from-1942746 sutton

** Tags added: originate-from-1942744

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https://bugs.launchpad.net/bugs/1942999

Title:
  [SRU][H/OEM-5.13/OEM-5.14/U] Fix invalid MAC address after hotplug tbt
  dock

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  New
Status in linux-oem-5.13 package in Ubuntu:
  New
Status in linux-oem-5.14 package in Ubuntu:
  New
Status in linux-oem-5.13 source package in Focal:
  New
Status in linux-oem-5.14 source package in Focal:
  New
Status in linux source package in Hirsute:
  New

Bug description:
  SRU justification:

  [Impact]
  igc driver can not connect to network after re-plugin thunderbolt dock when
  MAC passthrough enabled in BIOS.

  [Fix]
  Wait for the MAC copy of BIOS when enabled MAC passthrough.
  Intel engineer wants a different solution and promise to discuss with 
firmware engineer.
  Due to the schedule, made this as a short term solution to fix the issue, and 
wait for the other
  fix from Intel.

  [Test]
  Verified on hardware, after hotplug the thunderbolt cable,
  Ethernet works fine.

  [Where problems could occur]
  It may break the igc driver.

To manage notifications about this bug go to:
https://bugs.launchpad.net/hwe-next/+bug/1942999/+subscriptions


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