kernel modules "zstd" and "z3fold" missing.

[Dominic Parry]

The modules "zstd" and "z3fold" are missing despite being configured for zswap in "/boot/firmware/cmdline.txt." Messages appear on boot display that state they do not exist and so instead use compressor "lzo" and pool "zbud".

Ubuntu version is 22.04 LTS flashed from the official image.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-image-5.15.0-1008-raspi 5.15.0-1008.8
ProcVersionSignature: Ubuntu 5.15.0-1008.8-raspi 5.15.30
Uname: Linux 5.15.0-1008-raspi aarch64
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: arm64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Mon Jun 6 17:29:00 2022
ImageMediaBuild: 20220419
SourcePackage: linux-raspi
UpgradeStatus: No upgrade log present (probably fresh install)

[Dave Jones (waveform)]

Doh -- that one's my fault; included it in the kernel command line and completely forgot to include a patch in ubuntu-raspi-settings to add it to the set of modules for initramfs-tools to include in the initrd.

The workaround for now:

$ sudo -i
# echo zstd >> /etc/initramfs-tools/modules
# echo z3fold >> /etc/initramfs-tools/modules
# update-initramfs -u

I'll try and get this added to ubuntu-raspi-settings shortly.

[Dominic Parry (nothingconspicuous)]

Ok, thanks for the fast reply. Hope you have a good day :D

[Dave Jones (waveform)]

Oh, now I remember why this one was more complicated: it's for the pi *desktop specifically*. Can't add this to ubuntu-raspi-settings directly as that'll pull in zstd, z3fold, and all the zswap stuff on the server images too, which increases the memory burden on the minimal Zero 2 and 3A+ platforms.

So (for my own notes): this requires the creation of a new ubuntu-raspi-settings-desktop package (src:ubuntu-settings) and the addition of that package to the desktop-raspi seed in the ubuntu seed repo.

[Dave Jones (waveform)]

Attaching debdiff for ubuntu-settings. This adds the ubuntu-raspi-settings-desktop binary package which includes the necessary initramfs-tools configuration to include the missing modules. In addition to this, I'll file a merge proposal for the necessary seed to include this package in the Ubuntu Pi desktop image(s).

[Dave Jones (waveform)]

To sponsors: let me know if the ubuntu-raspi-settings-desktop name is not desirable; I'm happy to adjust this to (for example) ubuntu-desktop-raspi-settings but it'll need adjusting in both this debdiff, and in the MP for the corresponding seed.

[Launchpad Janitor (janitor)]

This bug was fixed in the package ubuntu-settings - 22.10.1

---------------
ubuntu-settings (22.10.1) kinetic; urgency=medium

  * Add ubuntu-raspi-settings-desktop package, adding z3fold and zstd modules
    to the Ubuntu Desktop on Raspberry Pi (LP: #1977764)
  * Add ubuntu-raspi-settings-server package, adding 99-fake-cloud.cfg
    to the Ubuntu Server on Raspberry Pi (LP: #1989807)
  * Moved network-manager and polkit settings (which are desktop-specific)
    from ubuntu-raspi-settings to ubuntu-raspi-settings-desktop
  * Bump standards version to current (4.6.0.1)

 -- Dave Jones <email address hidden> Wed, 20 Jul 2022 11:55:13 +0100

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.