[Bug 1934791] Update Released

[Brian Murray]

The verification of the Stable Release Update for u-boot has completed
successfully and the package is now being released to -updates.
Subsequently, the Ubuntu Stable Release Updates Team is being
unsubscribed and will not receive messages about this bug report.  In
the event that you encounter a regression using the package from
-updates please report a new bug using ubuntu-bug and tag the bug report
regression-update so we can easily find any regressions.

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https://bugs.launchpad.net/bugs/1934791

Title:
  SRU u-boot to focal to enable HiFive Unmatched booting

Status in u-boot package in Ubuntu:
  Fix Released
Status in u-boot source package in Focal:
  Fix Released

Bug description:
  In order to boot Ubuntu 20.04 on the Unmatched, the version of u-boot
  currently in hirsute will need to be SRU'd to focal.

  Raspberry pi core and classic images will need to be tested with this
  new version of u-boot as well to ensure nothing was broken by the SRU.

  [Impact]

   * Without the hirsute version of u-boot, the HiFive Unmatched
     will not boot focal

  [Test Case]

  For RISC-V "unmatched" boards:
   * Attempt to build a HiFive Unmatched image with 
     u-boot 2020.10+dfsg-1ubuntu0~20.04.2
   * Note that it fails to build
   * Build image with u-boot from proposed
   * Attempt to boot the Unmatched with the new version of u-boot
   * Verify that u-boot is able to load the kernel

  For Raspberry Pi boards (2, 3, 3+, 4 (inc. 8GB variant), 400, CM4):
   * Flash focal image to an SD card and boot it on the relevant Pi
   * Ensure card is fully up to date (sudo apt update && sudo apt upgrade)
   * Enable proposed (https://wiki.ubuntu.com/Testing/EnableProposed)
   * Update u-boot (sudo apt install u-boot-rpi)
   * Check reboot still boots successfully (sudo reboot)

  [Regression Potential]

  There are multiple changes being SRU'd, but since we know they all
  work in hirsute on these models the risk is fairly low. Attempts to
  boot all the supported Raspberry pi models should still be made to
  ensure no regression.

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