18.04.6 arm64 20210915 image contains mismatched udebs for HWE kernel

[dann frazier]

Trying to do an install with HWE kernel fails with:

   ┌──────────────┤ [!!] Load installer components from CD ├───────────────┐
   │ │
   │ No kernel modules were found. This probably is due to a mismatch │
   │ between the kernel used by this version of the installer and the │
   │ kernel version available in the archive. │
   │ │
   │ If you're installing from a mirror, you can work around this problem │
   │ by choosing to install a different version of Ubuntu. The install │
   │ will probably fail to work if you continue without kernel modules. │
   │ │
   │ Continue the install without loading kernel modules? │
   │ │
   │ <Go Back> <Yes> <No> │
   │ │
   └───────────────────────────────────────────────────────────────────────┘

This appears to be because the ISO has the udebs for 5.4.0-42, but the install time kernel is 5.4.0-84.

Note: it also has a series of module udebs for the 5.3.0-64 kernel, which would seem to just be taking up space.

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1943766

[Steve Langasek (vorlon)]

I can confirm that the contents of the package pool are incorrect, for amd64 as well as arm64. I notice that the local ftp mirror on cdimage-master is newer than the last ISO builds, so I'm going to try a respin to see if it fixes things - although it's unclear to me why anything would be picking up 5.4.0-42, the LAST version that debian-installer was updated to use, instead of the one pinned by the current version of debian-installer.

[Steve Langasek (vorlon)]

Not straightforward to tell by looking at launchpad whether this was a case of the local mirror having been out of date. Both linux-meta-hwe-5.4 (which provides linux-image-generic-hwe-18.04, which is what the debian-cd build keys on) and debian-installer were published to bionic-updates on 2021-09-13, but I can't see which was published first. I can see that at the time it was built, debian-installer was pulling 5.4.0-84 from -proposed, not from -updates.

Waiting to see results from the respin.

[Steve Langasek (vorlon)]

Still broken after a respin.

[Steve Langasek (vorlon)]

ok this is because there's an update to seeds required, matching the debian-installer update. Sorting now.

[Steve Langasek (vorlon)]

Verified fixed in 20210915.2.