Enable the hwe kernel flavor for 22.04.2

[Łukasz Zemczak]

[Impact]

As part of 22.04.2, we always enable the hwe kernel for desktop and server. Desktop switches to hwe by default, but server images need to offer both. Those require some changes in livecd-rootfs and other places. This is necessary for 22.04.2.

[Test Case]

Wait for daily builds once the hwe kernel is available, double check that the images build correctly. Boot the desktop image and confirm it's using the hwe kernel. Boot the server image and confirm there's a selection of which kernel to use and both GA and HWE kernels work.
Check flavor desktop images and make sure those also use the HWE kernel.

[Regression Potential]

Any regressions would possibly be around kernel selection for our images. Maybe checking flavors if they are still using the right ones would make sense. Most issues would be visible with image build failures.

[Brian Murray (brian-murray)]

Hello Łukasz, 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/2.765.15 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.

[Ubuntu SRU Bot (ubuntu-sru-bot)]

All autopkgtests for the newly accepted livecd-rootfs (2.765.15) for jammy have finished running.
The following regressions have been reported in tests triggered by the package:

ubuntu-image/2.2+22.04ubuntu3 (amd64)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/jammy/update_excuses.html#livecd-rootfs

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

[Łukasz Zemczak (sil2100)]

Downloaded the latest Xubuntu daily image, logged into the live session and confirmed via `uname -a` that the image is running the 5.19 HWE kernel. I then downloaded the latest server-live image, booted it up, confirmed that we have two grub options now. Tried both, subiquity started for each of them. For each of the two I opened up a shell and confirmed the right kernels (5.15 and 5.19).

Waiting for a final check of the Ubuntu Studio images as those are using the lowlatency kernel which we only recently released.

[Łukasz Zemczak (sil2100)]

Hello Łukasz, 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/2.765.16 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.

[Ubuntu SRU Bot (ubuntu-sru-bot)]

All autopkgtests for the newly accepted livecd-rootfs (2.765.15) for jammy have finished running.
The following regressions have been reported in tests triggered by the package:

ubuntu-image/2.2+22.04ubuntu3 (amd64)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/jammy/update_excuses.html#livecd-rootfs

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

[Łukasz Zemczak (sil2100)]

Okay, now everything works as expected. Confirmed with yesterday's daily re-run that the studio images now build successfully as well. Let's release this.

[Launchpad Janitor (janitor)]

This bug was fixed in the package livecd-rootfs - 2.765.16

---------------
livecd-rootfs (2.765.16) jammy; urgency=medium

  * Properly handle the lowlatency hwe kernel flavour.

livecd-rootfs (2.765.15) jammy; urgency=medium

  * Enable the hwe kernel variant for 22.04.2 (LP: #2006481).
    - Add it to the server images besides the ga kernel.
    - Switch to hwe as default for all desktop flavors.

 -- Łukasz 'sil2100' Zemczak <email address hidden> Thu, 16 Feb 2023 14:24:19 +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.