[Bug 2070070] [NEW] Support for Ubuntu Core tegra-igx images in jammy

[Loïc Minier]

Public bug reported:

This bug is to track changes needed to be able to build jammy Ubuntu
Core images for arm64+tegra-igx to support hardware based on NVIDIA
Tegra SoCs. NB some initial support had already been backported; see LP
#2015644.

[ Impact ]

 * This allows building missing image flavors for the NVIDIA Tegra families of hardware, notably Ubuntu Core images for the tegra-igx subarch.
 * This should also allow building of classic ISO installer images for tegra-igx, albeit that's a lesser priority.


[ Test Plan ]

 * Changes to livecd-rootfs were tested locally and can be tested from the -proposed package by building a Core image for tegra-igx as follows:
sudo apt install livecd-rootfs
mkdir build
cd build

rm -rf auto local config
rm -f livecd.*.model-assertion
mkdir -p auto
for s in config build clean; do ln -s /usr/share/livecd-rootfs/live-build/auto/$s auto/; done
lb clean --purge
export PROJECT=ubuntu-core ARCH=arm64 SUBARCH=tegra-igx SUITE=jammy IMAGEFORMAT=ubuntu-image CHANNEL=edge
lb config
sudo -E lb build


[ Where problems could occur ]

 * Changes are relatively light, but in the case of a regression for
instance due to broken logic, this could break existing image builds, in
which case an older livecd-rootfs could be reuploaded.


[ Other Info ]

 * These images are still being developed and its possible further
changes are needed as we iterate through the maturity of the image.

** Affects: livecd-rootfs (Ubuntu)
     Importance: Medium
         Status: Fix Released

** Affects: livecd-rootfs (Ubuntu Jammy)
     Importance: Medium
         Status: In Progress

** Also affects: livecd-rootfs (Ubuntu Jammy)
   Importance: Undecided
       Status: New

** Changed in: livecd-rootfs (Ubuntu)
       Status: New => Fix Released

** Changed in: livecd-rootfs (Ubuntu)
   Importance: Undecided => Medium

** Changed in: livecd-rootfs (Ubuntu Jammy)
   Importance: Undecided => Medium

** Changed in: livecd-rootfs (Ubuntu Jammy)
       Status: New => In Progress

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https://bugs.launchpad.net/bugs/2070070

Title:
  Support for Ubuntu Core tegra-igx images in jammy

Status in livecd-rootfs package in Ubuntu:
  Fix Released
Status in livecd-rootfs source package in Jammy:
  In Progress

Bug description:
  This bug is to track changes needed to be able to build jammy Ubuntu
  Core images for arm64+tegra-igx to support hardware based on NVIDIA
  Tegra SoCs. NB some initial support had already been backported; see
  LP #2015644.

  [ Impact ]

   * This allows building missing image flavors for the NVIDIA Tegra families of hardware, notably Ubuntu Core images for the tegra-igx subarch.
   * This should also allow building of classic ISO installer images for tegra-igx, albeit that's a lesser priority.

  
  [ Test Plan ]

   * Changes to livecd-rootfs were tested locally and can be tested from the -proposed package by building a Core image for tegra-igx as follows:
  sudo apt install livecd-rootfs
  mkdir build
  cd build

  rm -rf auto local config
  rm -f livecd.*.model-assertion
  mkdir -p auto
  for s in config build clean; do ln -s /usr/share/livecd-rootfs/live-build/auto/$s auto/; done
  lb clean --purge
  export PROJECT=ubuntu-core ARCH=arm64 SUBARCH=tegra-igx SUITE=jammy IMAGEFORMAT=ubuntu-image CHANNEL=edge
  lb config
  sudo -E lb build

  
  [ Where problems could occur ]

   * Changes are relatively light, but in the case of a regression for
  instance due to broken logic, this could break existing image builds,
  in which case an older livecd-rootfs could be reuploaded.

  
  [ Other Info ]

   * These images are still being developed and its possible further
  changes are needed as we iterate through the maturity of the image.

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