[Bug 2098777] [NEW] Intel-microcode 3.20250211.0ubuntu0.20.04.1 causes panic and bootloop

[Lorenzo Maurizi]

Public bug reported:

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

Ubuntu Version: 20.04.6 LTS

** Affects: intel-microcode (Ubuntu)
     Importance: Undecided
         Status: New

** Summary changed:

- Intel-microcode 3.20250211.0ubuntu0.20.04.1 causes panic during boot
+ Intel-microcode 3.20250211.0ubuntu0.20.04.1 causes panic and bootloop

** 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, errors seem to come from "tg3" (broadcom Tigon3 Ethernet driver for NICs). 
+ 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
  
  Ubuntu Version: 20.04.6 LTS

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to intel-microcode in Ubuntu.
https://bugs.launchpad.net/bugs/2098777

Title:
  Intel-microcode 3.20250211.0ubuntu0.20.04.1 causes panic and bootloop

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

  Ubuntu Version: 20.04.6 LTS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/intel-microcode/+bug/2098777/+subscriptions