Just did a fresh install of Ubuntu 20.04 LTS on a NUC replacing 19.10.
The aforementioned issue has changed and it appears whatever was changed
post 5.3.0-24 was done intentionally.

The machine finishes post and the normal Intel NUC splash screen appears
with the F Keys displayed. The screen stays longer than before with the
F Keys slowly fading away to be replaced with only the Intel NUC splash
and the new Ubuntu logo. Both sharing the same screen. Then continuing
on to the normal desktop if the auto login is enabled. The entire
process about 7 seconds.

I don't think this is a bug as I reported it. Folks that actually work
on the kernel would know more than I but this certainly looks like the
latest kernel was designed to use and control the Intel splash screen.

On the Z77 using legacy boot the screen just stays black and boots in
the same amount of time.

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https://bugs.launchpad.net/bugs/1858811

Title:
  Linux 5.3.0-26-generic kernel

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Just after installation and reboot of Linux 5.3.0-26 kernel and reboot
  on two NUC machines UEFI they displayed the normal Intel splash screen
  followed by the normal grub menu. Then went back to the Intel splash
  screen again and continued to the desktop. I have another machine Asus
  Z77 with legacy boot and the same kernel update with no such issue.

  It should be noted that both NUC machines have been running since
  October last year with Ubuntu 18.10 without kernel issues up until
  now. As a result I have rolled back to Linux 5.3.0-24 and no such
  behavior is displayed.

  The NUCs involved are NUC7i7BNH and NUC5i7RYH.

  Thanks,
  Gerald Rozner

  ProblemType: Bug
  DistroRelease: Ubuntu 19.10
  Package: linux-image-5.3.0-24-generic 5.3.0-24.26
  ProcVersionSignature: Ubuntu 5.3.0-24.26-generic 5.3.10
  Uname: Linux 5.3.0-24-generic x86_64
  ApportVersion: 2.20.11-0ubuntu8.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  gerald      915 F.... pulseaudio
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Jan  8 10:08:41 2020
  InstallationDate: Installed on 2018-11-08 (426 days ago)
  InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 
(20180725)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 002: ID 8087:0a2b Intel Corp. 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Intel Corporation NUC7i7BNH
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 i915drmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-24-generic 
root=UUID=0e89ac23-8213-483e-9102-240ad3cfe107 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-5.3.0-24-generic N/A
   linux-backports-modules-5.3.0-24-generic  N/A
   linux-firmware                            1.183.3
  SourcePackage: linux
  UpgradeStatus: Upgraded to eoan on 2019-10-21 (78 days ago)
  dmi.bios.date: 02/22/2018
  dmi.bios.vendor: Intel Corp.
  dmi.bios.version: BNKBL357.86A.0062.2018.0222.1644
  dmi.board.name: NUC7i7BNB
  dmi.board.vendor: Intel Corporation
  dmi.board.version: J31145-310
  dmi.chassis.type: 3
  dmi.chassis.vendor: Intel Corporation
  dmi.chassis.version: 2
  dmi.modalias: 
dmi:bvnIntelCorp.:bvrBNKBL357.86A.0062.2018.0222.1644:bd02/22/2018:svnIntelCorporation:pnNUC7i7BNH:pvrJ31153-311:rvnIntelCorporation:rnNUC7i7BNB:rvrJ31145-310:cvnIntelCorporation:ct3:cvr2:
  dmi.product.family: Intel NUC
  dmi.product.name: NUC7i7BNH
  dmi.product.version: J31153-311
  dmi.sys.vendor: Intel Corporation

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