Kernel 6.8.0-40 hangs

Back to my old problem. I have three machines running on UB 22.04, one an older Thinkpad T510. This specific machine would not install 24.04, it would hang during the installation process.
Well on Aug 7, a new kernel was insgtalled, 6.8.0-40. Neither of my other newer UB 22.04 systems have this update. Anyway, this kernel hangs once logged in.
So, my question is, why the kernel jump from 6.5.0-44-generic up to 6.8?

type oStart-Date: 2024-08-07  13:10:29
Commandline: aptdaemon role='role-commit-packages' sender=':1.92'
Install: linux-tools-common:amd64 (5.15.0-118.128, automatic), linux-hwe-6.8-headers-6.8.0-40:amd64 (6.8.0-40.40~22.04.3, automatic), linux-hwe-6.8-tools-6.8.0-40:amd64 (6.8.0-40.40~22.04.3, automatic), linux-modules-6.8.0-40-generic:amd64 (6.8.0-40.40~22.04.3, automatic), linux-image-6.8.0-40-generic:amd64 (6.8.0-40.40~22.04.3, automatic), linux-headers-6.8.0-40-generic:amd64 (6.8.0-40.40~22.04.3, automatic), linux-tools-6.8.0-40-generic:amd64 (6.8.0-40.40~22.04.3, automatic), linux-modules-extra-6.8.0-40-generic:amd64 (6.8.0-40.40~22.04.3, automatic)r paste code here

Thats a little odd - the 6.8 kernel is only installed on Jammy if the linux-generic-hwe-22.04-edge (or one of its associated edge packages) is installed.

Thats a little odd - the 6.8 kernel is only installed on Jammy

Yes, that was my thinking as well.
The update before had a start date of Start-Date: 2024-07-17 10:32:19

Check you’ve not enabled proposed on your system

 linux-image-generic-hwe-22.04      | 6.5.0.45.45~22.04.1 | jammy-updates  | amd64, arm64, armhf, ppc64el, s390x
 linux-image-generic-hwe-22.04      | 6.8.0-40.40~22.04.3 | jammy-proposed | amd64, arm64, armhf, ppc64el, s390x

The 6.8 HWE kernel has been in proposed a few days now (if I recall correctly). Testing/EnableProposed - Ubuntu Wiki

Remember just enabling proposed no longer updates packages that you have installed. You now have to explicitly install the named packages

I.e.

 sudo apt install xyz/jammy-proposed

The linked wiki applies to old versions of ubuntu where proposed upgraded stuff without people realising.

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Todays apt update on another of my UB 22.04 laptops installed the 6.8.0-40 kernel. Is this OK or is something wrong?

Nothing wrong - Canonical has updated its HWE package stack and is now phasing the v6.8 rollout.

This started yesterday linux-meta-hwe-6.8 package : Ubuntu

Kind of still puzzled that your report from the 7th of August said you received the update.

This is the final kernel for jammy - it will be part of the final point release for jammy 22.04.5 now due in the next few weeks.

I am sorry but I am getting a bit discouraged with Canonical and their QA for the LTS release. All sub-versions of Ubuntu, running 22.04.4, and the 6.8 kernel seem to have problems. I have been looking at the Ubuntu forum and there are all sorts of problem being reported with the 6.8 kernel.

I now have three laptops that have serious problems with this kernel:
Thinkpad T510 hangs with 22.04 and the 6.8 kernel-- had to revert to 6.5 kernel

Dell XPS 15 Series 7530 (my wife’s laptop) will not boot with this kernel – screen flicker with the encrypted /home partition. Reveted to 6.5 kernel.
Dell XPS 15 one year old (my laptop) will not run Virtual Box on the 6.8 kernel – reverted to 6.5