What is the Kernel Maintenance Period for Linux Kernel 5.19 on Ubuntu 22.04?

kyleyoon

7/7/24, 3:41 AM

I understand that with the release of Ubuntu 22.04.2 LTS, support has been provided for the 5.19 kernel and HWE packages.

However, upon checking the Linux long-term kernel versions on the following site, it appears that 5.19 is not a long-term kernel, and version 5.19.17 reached its EOL on October 24, 2022.

https://www.kernel.org/category/releases.html

I'm curious as to whether bug and security patches for the 5.19 kernel supported by 22.04.2 LTS are being handled by Canonical.

185

1 + 1

kernel

user535733

7/7/24, 4:16 AM

Don't confuse kernel.org EOL with Ubuntu EOL. They will have different dates.

Score:3

Ubuntu

guiverc

7/7/24, 3:55 AM

The replacement kernel, which is part of the 22.04.3 rollout scheduled next month (the release is actually the ISO release, with currently installed system having received it before ISO release which is the date tracked) is already visible.

A CLI enquiry will show

linux-image-generic-hwe-22.04-edge | 6.2.0.25.25~22.04.5   | jammy-proposed   | amd64, arm64, armhf, ppc64el, s390x

which is what is replacing the current 5.19. When that kernel upgrades from the current proposed, it'll be available for 22.04 or jammy users using the edge kernel. It'll then progress for use by normal HWE users & you'll find yourself moving away from 5.19 :)

Ubuntu HWE kernel stacks come from the non-LTS releases, 5.19 from 22.10 which has already had it's EOL warning notices out for awhile now and thus the replacement kernel (which has been viewable in proposed since last week) soon to be rolled out.

If it's the date that upstream stop supporting a kernel, don't be. Ubuntu/Canonical devs will backport security fixes during the supported life of that kernel for Ubuntu releases; so just apply fixes. You'll get replacements (like the 6.2 kernel I've shown here) before the EOL date for Ubuntu support of that package occurs.

To learn more about the HWE or hardware enablement stack kernels please refer https://wiki.ubuntu.com/Kernel/LTSEnablementStack

+ 4

guiverc

7/7/24, 3:57 AM

I'm involved in QA, thus watch the kernel stack roll out, particularly to see when it appears on the *daily* ISOs and I can start official testing (rather than current ~weekly) of the next cycle... As we're only a ~month away (10 August as per https://discourse.ubuntu.com/t/jammy-jellyfish-release-schedule/23906) the release of 6.2 is getting rather close, as is normal & why I check for it now daily.

guiverc

7/7/24, 3:59 AM

While it's possible that 5.19 will still be *supported* after the date when 22.10 is EOL, that is unlikely given it's more work on the Ubuntu community (esp. Canonical staff), but if it happens (*it's happened before with the package rolling out a few days late*) the 5.19 will be supported until its replacement is available & fully rolled out/supported.

kyleyoon

7/7/24, 4:23 AM

Thank you! That was helpful.

guiverc

7/7/24, 4:27 AM

Just FYI: the line I pasted was from the output of `rmadison linux-image-generic-hwe-22.04-edge` ... ie. looking at where the 6.2 kernel (*currently*) can be seen as regards *edge*.. which is where I see it first.. What I really want is it on the 22.04.3 *daily* ISOs, but I don't scan the *manifests* there until I've noticed fully via *edge*.

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