[Bug 2116199] Re: apparmor feature missmatch for 6.14 HWE kernel

[Bryan Alexander]

** Description changed:

- Preseeding with the HWE 6.14 kernel fails due to apparmor feature
+ Preseeding with the HWE 6.14 kernel fails due to AppArmor feature
  mismatch.
  
  [ Impact ]
  
- preseeding with that kernel fails which makes the boot slower.
+ When building Ubuntu images with the HWE 6.14 kernel using livecd-
+ rootfs, snap preseeding fails since there is a mismatch between the
+ kernel's AppArmor capabilities and the capabilities listed in livecd-
+ rootfs. As a result, these images have slower boot times as snaps are
+ being seeded at first boot instead of image creation.
  
  [ Test Plan ]
  
- * build image with livecd-rootfs
- * register image on cloud
- * boot image
- * check that "snap debug seeding" output doesn't contain the "seed-restart-system-key" key.
+ * Build an image with livecd-rootfs
+ * Register the image on the cloud
+ * Boot into the image
+ * Check that "snap debug seeding" output doesn't contain the "seed-restart-system-key" key. Otherwise, check the `seed-restart-system-key` to see what features are missing.
  
  [ Where problems could occur ]
  
- Very unlikely that this creates problems. We backported similar changes
- a couple of times already.
+ The risk of regressions is minimal since we have previously backported
+ similar changes a couple of times, and there should not be any runtime
+ changes for end-users. One potential problem is if the proposed changes
+ do not properly rectify the mismatch in the AppArmor features, which
+ will cause the slow boot times to remain.
  
  [ Other Info ]
  * This bug affects both Noble and Questing
  * a similar SRU we did already is https://bugs.launchpad.net/ubuntu/+source/livecd-rootfs/+bug/2037567

** Summary changed:

- apparmor feature missmatch for 6.14 HWE kernel
+ apparmor feature mismatch for 6.14 HWE kernel

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https://bugs.launchpad.net/bugs/2116199

Title:
  apparmor feature mismatch for 6.14 HWE kernel

Status in livecd-rootfs package in Ubuntu:
  In Progress
Status in livecd-rootfs source package in Noble:
  In Progress
Status in livecd-rootfs source package in Oracular:
  Won't Fix
Status in livecd-rootfs source package in Plucky:
  In Progress
Status in livecd-rootfs source package in Questing:
  In Progress

Bug description:
  Preseeding with the HWE 6.14 kernel fails due to AppArmor feature
  mismatch.

  [ Impact ]

  When building Ubuntu images with the HWE 6.14 kernel using livecd-
  rootfs, snap preseeding fails since there is a mismatch between the
  kernel's AppArmor capabilities and the capabilities listed in livecd-
  rootfs. As a result, these images have slower boot times as snaps are
  being seeded at first boot instead of image creation.

  [ Test Plan ]

  * Build an image with livecd-rootfs
  * Register the image on the cloud
  * Boot into the image
  * Check that "snap debug seeding" output doesn't contain the "seed-restart-system-key" key. Otherwise, check the `seed-restart-system-key` to see what features are missing.

  [ Where problems could occur ]

  The risk of regressions is minimal since we have previously backported
  similar changes a couple of times, and there should not be any runtime
  changes for end-users. One potential problem is if the proposed
  changes do not properly rectify the mismatch in the AppArmor features,
  which will cause the slow boot times to remain.

  [ Other Info ]
  * This bug affects both Noble and Questing
  * a similar SRU we did already is https://bugs.launchpad.net/ubuntu/+source/livecd-rootfs/+bug/2037567

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