Legacy image for Ubuntu 20.04.2 not published

[Stian Mathiassen]

There is no legacy-image for Ubuntu 20.04.2/20.04.2.0 available for download. I have not found any announcements that this image will not be part of the LTS cycle, and will not receive updates. My assumption with LTS releases is that all parts of the release will be supported according the release cycle.

https://ubuntu.com/about/release-cycle

Hardware requiring the HWE kernel for drivers during installation will not be able to use the legacy image for installation without the 20.04.2 update, since it introduces the HWE kernel.

Someone has asked here, but there is no link to any announcement to discontinue the legacy image inside the support time window.
https://askubuntu.com/questions/1320977/does-ubuntu-no-longer-provide-new-legacy-image

This question mentions workarounds not feasible, since the installer requires the HWE kernel to get driver support for newer hardware.
https://answers.launchpad.net/ubuntu/+question/696418

The impression I got in this thread was that 20.04 was the last version to get Debian installer images.
https://discourse.ubuntu.com/t/server-installer-plans-for-20-04-lts/13631

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1933442/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Stian Mathiassen (stianmat2222)]

Looks like there is released udeb packages for the latest HWE kernel https://packages.ubuntu.com/focal-updates/debian-installer/kernel-image-5.11.0-22-generic-di

I tried cloning https://code.launchpad.net/~ubuntu-core-dev/debian-installer/focal-proposed and to create a initrd.gz with those udebs by changing the config to use by changing `BASEVERSION` in `build/config/amd64.cfg`. Based the build on the commands found here https://wiki.debian.org/DebianInstaller/Modify/CustomKernel

Tried to copy the HWE kernel and the corresponding initrd.gz to an extracted image and update GRUB to use the new kernel and initrd.gz. Used the following guides:

https://help.ubuntu.com/community/InstallCDCustomization
https://help.ubuntu.com/community/LiveCDCustomization

Sadly the installer is then unable to mount the installation media, and locks up so I am unable to open a terminal using Alt-F2 to debug why it cant mount the installation media.

Hope this might help someone else wanting a new release of the legacy image for Ubuntu 20.04.