[Bug 2098777] Re: Intel-microcode 3.20250211.0ubuntu0.20.04.1 causes panic and bootloop on Dell PowerEdge R740xd

[Lorenzo Maurizi]

** Summary changed:

- Intel-microcode 3.20250211.0ubuntu0.20.04.1 causes panic and bootloop
+ Intel-microcode 3.20250211.0ubuntu0.20.04.1 causes panic and bootloop on Dell PowerEdge R740xd

** Description changed:

  After updating intel-microcode from 3.20241112.0ubuntu0.20.04.1 to
  3.20250211.0ubuntu0.20.04.1 in my Ubuntu Server 20.04.6 LTS the server
  is stuck in a bootloop.
  
  Sometimes I can see an error on console while booting, or sometimes it reboots without completing bootup sequence, and is no more usable.
  For what I have seen on console, it appears to be a kernel panic error coming from "tg3" (broadcom Tigon3 Ethernet driver for NICs).
  
  Now I succeeded in reverting to version 3.20241112.0ubuntu0.20.04.1 thanks to recovery mode, and server is booting and stable again.
  I put the package on hold to prevent upgrading.
  
  Server is a Dell PowerEdge R740XD
+ 
  Processor: 1x Intel(R) Xeon(R) Gold 6238R CPU @ 2.20GHz
- NIC is the integrated, quad-port Broadcom NetXtreme Gigabit Ethernet (BCM5720) with firmware 23.11.4
+ CPU family:                         6
+ Model:                              85
+ Model name:                         Intel(R) Xeon(R) Gold 6238R CPU @ 2.20GHz
+ Stepping:                           7
+ 
+ NIC is the integrated, quad-port Broadcom NetXtreme Gigabit Ethernet
+ (BCM5720) with firmware 23.11.4
  
  Ubuntu Version: 20.04.6 LTS

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https://bugs.launchpad.net/bugs/2098777

Title:
  Intel-microcode 3.20250211.0ubuntu0.20.04.1 causes panic and bootloop
  on Dell PowerEdge R740xd

Status in intel-microcode package in Ubuntu:
  New

Bug description:
  After updating intel-microcode from 3.20241112.0ubuntu0.20.04.1 to
  3.20250211.0ubuntu0.20.04.1 in my Ubuntu Server 20.04.6 LTS the server
  is stuck in a bootloop.

  Sometimes I can see an error on console while booting, or sometimes it reboots without completing bootup sequence, and is no more usable.
  For what I have seen on console, it appears to be a kernel panic error coming from "tg3" (broadcom Tigon3 Ethernet driver for NICs).

  Now I succeeded in reverting to version 3.20241112.0ubuntu0.20.04.1 thanks to recovery mode, and server is booting and stable again.
  I put the package on hold to prevent upgrading.

  Server is a Dell PowerEdge R740XD

  Processor: 1x Intel(R) Xeon(R) Gold 6238R CPU @ 2.20GHz
  CPU family:                         6
  Model:                              85
  Model name:                         Intel(R) Xeon(R) Gold 6238R CPU @ 2.20GHz
  Stepping:                           7

  NIC is the integrated, quad-port Broadcom NetXtreme Gigabit Ethernet
  (BCM5720) with firmware 23.11.4

  Ubuntu Version: 20.04.6 LTS

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