Support for Ubuntu Core tegra-igx images in jammy

[Loïc Minier]

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.

[Loïc Minier (lool)]

Uploaded 2.765.44, now in Unapproved https://launchpad.net/ubuntu/jammy/+queue?queue_state=1&queue_text=livecd-rootfs

[Andreas Hasenack (ahasenack)]

Hello Loïc, or anyone else affected,

Accepted livecd-rootfs into jammy-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/livecd-rootfs/2.765.44 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-jammy to verification-done-jammy. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-jammy. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Loïc Minier (lool)]

Installed https://launchpad.net/ubuntu/+source/livecd-rootfs/2.765.44/+build/28611104/+files/livecd-rootfs_2.765.44_arm64.deb in a jammy arm64 LXD container and ran commands from the Test plan:
ubuntu@jammy:~/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

[2024-06-28 13:46:32] lb_clean --purge
P: Executing auto/clean script.
[2024-06-28 13:46:32] lb_clean noauto --purge
P: Executing auto/clean script.
[2024-06-28 13:46:32] lb_clean noauto --all
P: Cleaning chroot
P: Executing auto/clean script.
[2024-06-28 13:46:32] lb_clean noauto --cache
[2024-06-28 13:46:32] lb_config
P: Executing auto/config script.
Building on jammy.lxd
Configured ubuntu-image for the following model assertion:
type: model
authority-id: canonical
series: 16
brand-id: canonical
model: ubuntu-core-22-tegra-igx-edge
architecture: arm64
base: core22
grade: signed
snaps:
  -
    default-channel: 22-igx/edge
    id: 9pjCtYlNoT9Fx6RiHMhhBoIG6ZYXBvJc
    name: tegra
    type: gadget
  -
    default-channel: 22-igx/edge
    id: Rjyoy6Zhe9mlkBQqmVzaUdPB2TblFSwV
    name: tegra-kernel
    type: kernel
  -
    default-channel: latest/edge
    id: amcUKQILKXHHTlmSa7NMdnXSx02dNeeT
    name: core22
    type: base
  -
    default-channel: latest/edge
    id: PMrrV4ml8uWuEUDBT8dSGnKUYbevVhc4
    name: snapd
    type: snapd
timestamp: 2024-04-23T15:12:16+00:00
sign-key-sha3-384: 9tydnLa6MTJ-jaQTFUXEwHl1yRx7ZS4K5cyFDhYDcPzhS7uyEkDxdUjg9g08BtNn
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----------------------------------------------------------
[2024-06-28 13:46:32] lb_build
P: Executing auto/build script.
WARNING: proceeding to download snaps ignoring validations, this default will change in the future. For now use --validation=enforce for validations to be taken into account, pass instead --validation=ignore to preserve current behavior going forward
Fetching snapd
Fetching tegra-kernel
Fetching core22
Fetching tegra

Worked fine, model assertion is correct and manifest is as expected:
ubuntu@jammy:~/build$ ls
auto
config
livecd.ubuntu-core-tegra-igx.img.xz
livecd.ubuntu-core-tegra-igx.manifest
livecd.ubuntu-core-tegra-igx.model-assertion
output
ubuntu@jammy:~/build$ cat livecd.ubuntu-core-tegra-igx.manifest
core22 1522.snap
snapd 22...

[Loïc Minier (lool)]

I also booted the resulting Core image on a Jetson AGX Orin, I had to try a couple of times, not sure why, perhaps quirks with the BIOS and me trying to boot from a SD card reader, but eventually I got the installer prompt from Ubuntu Core, albeit I didn't manage to progress it, I think it demonstrates a good starting point for the image – might still have to address the kernel/userspace etc.

================================================================================
  Ubuntu Core ================================================================================
  Configure the network and setup an administrator account on this all-snap
  Ubuntu Core system.

[Launchpad Janitor (janitor)]

This bug was fixed in the package livecd-rootfs - 2.765.44

---------------
livecd-rootfs (2.765.44) jammy; urgency=medium

  [ Rémy Martin ]
  * Backport support for building tegra-igx Server and Core images;
    LP: #2070070.

livecd-rootfs (2.765.43) jammy; urgency=medium

  * buildd/02-disk-image-uefi add udev early hook to satisfy grub-probe
    and grub-install. (LP: #2064175)

livecd-rootfs (2.765.42) jammy; urgency=medium

  [ Ankush Pathak ]
  * Add policy:unconfined_restrictions feature to 6.5 kernel (LP: #2062929)

 -- Philip Roche <email address hidden> Thu, 27 Jun 2024 14:11:06 +0100

[Łukasz Zemczak (sil2100)]

The verification of the Stable Release Update for livecd-rootfs 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.