[Bug 1847587] Re: [SRU] Add entries for Pi 4

[Launchpad Bug Tracker]

This bug was fixed in the package flash-kernel - 3.98ubuntu11~18.04.1

---------------
flash-kernel (3.98ubuntu11~18.04.1) bionic; urgency=medium

  * Permit flash-kernel to workaround an inconsistent /boot directory when
    triggered prior to the kernel finishing its triggers (LP: #1861292)

flash-kernel (3.98ubuntu10~18.04.1) bionic; urgency=medium

  * SRU of 3.98ubuntu10 to support Raspberry Pi 4B. (LP: #1847587)
  * Removed new entries from db/all.db for machines that were not already
    supported on Bionic
  * Remove "quiet splash" from kernel command line options; Bionic shipped
    without these options and we shouldn't change the boot experience for
    existing users
  * Ensure the "overlays" dir always exists on the boot partition; the Bionic
    image for the Pi 2 shipped without this dir

 -- Dave Jones <dave.jones at canonical.com>  Wed, 29 Jan 2020 16:15:05
+0000

** Changed in: flash-kernel (Ubuntu Bionic)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1847587

Title:
  [SRU] Add entries for Pi 4

Status in flash-kernel package in Ubuntu:
  Fix Released
Status in flash-kernel source package in Bionic:
  Fix Released

Bug description:
  Impact
  ======

  The current stable release (bionic) does not support booting on the
  Raspberry Pi 4. Several packages need back-porting from devel to
  support this, along with a new kernel.

  Bionic back-port branch:

  https://code.launchpad.net/~waveform/ubuntu/+source/flash-kernel/+git
  /flash-kernel/+ref/bionic-clean-up

  Focal branch:

  https://code.launchpad.net/~waveform/ubuntu/+source/flash-kernel/+git
  /flash-kernel/+ref/focal-clean-up

  Builds of packages for both releases available from the following PPA
  (along with all packages required for testing the bionic back-port):

  https://launchpad.net/~waveform/+archive/ubuntu/pi4

  Test Case
  =========

  * Attempt to boot the latest bionic image (18.04.3) on a pi4; note failure
  * Move the SD card to a pi3 and boot successfully
  * Ensure all packages are up to date (apt update/upgrade)
  * sudo add-apt-repository ppa:waveform/pi4
  * sudo apt upgrade
  * sudo reboot
  * Ensure boot proceeds successfully on the pi3
  * Verify facilities (USB peripherals, USB mass storage, wifi, bluetooth, audio, etc.) work
  * sudo apt install linux-image-raspi2-hwe-18.04-edge
  * sudo reboot
  * Ensure boot proceeds successfully on the pi3
  * Verify facilities (USB peripherals, USB mass storage, wifi, bluetooth, audio, etc.) work
  * Move the SD card back to the pi4
  * Ensure boot proceeds successfully on the pi4
  * Verify facilities (USB peripherals, USB mass storage, wifi, bluetooth, audio, etc.) work
  * Repeat for both archs (armhf and arm64)

  Regression Potential
  ====================

  Plenty; pi4 support on bionic requires back-ports of flash-kernel,
  u-boot, linux-firmware-raspi2, and the kernel. Furthermore, the
  firmware package needs to support two kernels (the current 4.x series
  and the proposed 5.x series). Verification of boot, and other
  facilities (USB peripherals, mass storage, free memory, wifi, etc.
  etc.) should be performed on both archs and all supported models of pi
  (2, 3, 3A+, 3B+, 4B all memory variants).

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