Public bug reported:

Tested on bionic GA 4.15.0-70-generic 4.15.0-71-generic
and also HWE 5.0.0-37-generic 5.3.0-23-generic

Only 4.15.0-71-generic can not boot on Cavium ThunderX2

On console nothing after EFI messages.

Loading Linux 4.15.0-71-generic ...
Loading initial ramdisk ...
EFI stub: Booting Linux Kernel...
EFI stub: EFI_RNG_PROTOCOL unavailable, no randomness supplied
EFI stub: Using DTB from configuration table
EFI stub: Exiting boot services and installing virtual address map...

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

** Affects: linux (Ubuntu Bionic)
     Importance: Undecided
     Assignee: Ike Panhc (ikepanhc)
         Status: New

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

** Description changed:

  Tested on bionic GA 4.15.0-70-generic 4.15.0-71-generic
  and also HWE 5.0.0-37-generic 5.3.0-23-generic
  
  Only 4.15.0-71-generic can not boot on Cavium ThunderX2
  
- Nothing after EFI messages.
+ On console nothing after EFI messages.
  
  Loading Linux 4.15.0-71-generic ...
  Loading initial ramdisk ...
  EFI stub: Booting Linux Kernel...
  EFI stub: EFI_RNG_PROTOCOL unavailable, no randomness supplied
  EFI stub: Using DTB from configuration table
  EFI stub: Exiting boot services and installing virtual address map...

** Changed in: linux (Ubuntu Bionic)
     Assignee: (unassigned) => Ike Panhc (ikepanhc)

** Changed in: linux (Ubuntu)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1852723

Title:
  [Regression] Bionic kernel 4.15.0-71.80 can not boot on ThunderX2

Status in linux package in Ubuntu:
  Invalid
Status in linux source package in Bionic:
  New

Bug description:
  Tested on bionic GA 4.15.0-70-generic 4.15.0-71-generic
  and also HWE 5.0.0-37-generic 5.3.0-23-generic

  Only 4.15.0-71-generic can not boot on Cavium ThunderX2

  On console nothing after EFI messages.

  Loading Linux 4.15.0-71-generic ...
  Loading initial ramdisk ...
  EFI stub: Booting Linux Kernel...
  EFI stub: EFI_RNG_PROTOCOL unavailable, no randomness supplied
  EFI stub: Using DTB from configuration table
  EFI stub: Exiting boot services and installing virtual address map...

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