The kernel linux-image-extras-* package intentionally calls postinst scripts even when it is rmeoved. This is required because after its removal you have still have the kernel installed though in a very slimmed down form; one which is valid for booting in a VM for instance. The postrm for the linux-image-* package will call the required postrm when and if the whole kernel is removed. We have to call all of the postinst (not just update-initramfs as we cannot know what else needs to care that the initramfs has changed; typically the bootloader which is informed of the kernel change via the /etc/kernel/* hooks. Without this the initramfs can get built without the contents of the -extras package, bootloaders can consume _that_ version and you have an unbootable system even though you subsequently installed linux-image-extra-*.
All of the scripts in the /etc/kernel/* hook directories need to be careful to view the world in the context of the installed system and idempotent against rerunning as they are part of postinst/postrm which has this requirement. If they are breaking in the face of this occuring the hooks are broken and we need to fix them. It sounds like apt-auto-remove was incorrectly calculating the list of kernels in the past, but I understand that is fixed. Is there any other hook known to cause issues. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1501884 Title: linux-image-extra-*-generic postrm script runs install actions Status in linux package in Ubuntu: Confirmed Status in linux-lts-trusty package in Ubuntu: Confirmed Bug description: Hi, The postrm maintainer script in the binary packages linux-image- extra-*-generic runs the scripts in /etc/kernel/postinst.d instead of those in /etc/kernel/postrm.d. This can have all sorts of undesirable consequences depending on what other packages add to those directories, but I noticed it because it caused /etc/kernel/postinst.d/apt-auto-removal to make the wrong decisions leaving my servers with only one installed kernel left. Cheers, Seb To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1501884/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
