Here are my notes from filing a duplicate issue (with just dracut, initramfs-tools is purged), the missing step in bdrung's comment is kernel-install.
This issue involves systemd (the kernel-install command, the /usr/lib/kernel/install.d/55-initrd.install script that copies /boot/initrd.img-$KERNEL_VERSION from /boot to /boot/efi), third-party scripts hooking into kernel-install like dracut-core's /usr/lib/kernel/install.d/50-dracut.install, and dracut, which provides /etc/kernel/postinst.d/dracut which is run by kernel-image maintainer scripts like /var/lib/dpkg/info/linux-image-6.14.0-15-generic.postinst. Steps (thanks to execsnoop on apt reinstall linux-image-$KERNEL_VERSION): - /etc/kernel/postinst.d/dracut generates /boot/initrd.img-$KERNEL_VERSION - /etc/kernel/postinst.d/initramfs-tools calls update-initramfs (shipped by either dracut or initramfs-tools) - /usr/sbin/update-initramfs calls /etc/initramfs/post-update.d/systemd-boot, which calls kernel-install - /etc/kernel/postinst.d/zz-systemd-boot also calls kernel-install if neither dracut nor initramfs-tools is installed - kernel-install then runs: - /usr/lib/kernel/install.d/50-dracut.install from dracut-core, which runs dracut again, generates /boot/efi/$MACHINE_ID/$KERNEL_VERSION/initrd - /usr/lib/kernel/install.d/55-initrd.install from systemd which copies /boot/initrd.img-$KERNEL_VERSION to /boot/efi/$MACHINE_ID/$KERNEL_VERSION/initrd.img-$KERNEL_VERSION Which is how the EFI system partition ends up with duplicate initrds for every kernel version. ESP space is limited and hard to grow so this is problematic. On 25.04 plucky, it is possible to have dracut-core installed, dracut and initramfs-tools both purged (purge removes left-over hooks from /etc), in which case dracut-core will still generate an /boot/efi/$MACHINE_ID/$KERNEL_VERSION/initrd, /boot/initrd.img-$KERNEL_VERSION won't be generated for newly installed kernels, and the duplication is avoided. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/2100296 Title: Double initrd in /efi/<machine-id>/<kver>/ with systemd-boot Status in dracut package in Ubuntu: Confirmed Status in systemd package in Ubuntu: Confirmed Bug description: With the combination of using dracut and systemd-boot from plucky- proposed I get two initrds copied to the EFI partition: /efi/2504a9c37a434fc28843779e4d0b34eb/6.14.0-5-generic /efi/2504a9c37a434fc28843779e4d0b34eb/6.14.0-5-generic/linux /efi/2504a9c37a434fc28843779e4d0b34eb/6.14.0-5-generic/jh7110-starfive-visionfive-2-v1.3b.dtb /efi/2504a9c37a434fc28843779e4d0b34eb/6.14.0-5-generic/initrd /efi/2504a9c37a434fc28843779e4d0b34eb/6.14.0-5-generic/initrd.img-6.14.0-5-generic ..and both of them enabled in the config file root@visionfive2~# cat /efi/loader/entries/2504a9c37a434fc28843779e4d0b34eb-6.14.0-5-generic.conf # Boot Loader Specification type#1 entry # File created by /usr/lib/kernel/install.d/90-loaderentry.install (systemd 257.3-1ubuntu3) title Ubuntu Plucky Puffin (development branch) version 6.14.0-5-generic machine-id 2504a9c37a434fc28843779e4d0b34eb sort-key ubuntu options earlycon console=ttyS0,115200n8 rootwait root=/dev/nvme0n1 rootfstype=btrfs ro rootflags=ssd,subvol=/plucky systemd.machine_id=2504a9c37a434fc28843779e4d0b34eb linux /2504a9c37a434fc28843779e4d0b34eb/6.14.0-5-generic/linux devicetree /2504a9c37a434fc28843779e4d0b34eb/6.14.0-5-generic/jh7110-starfive-visionfive-2-v1.3b.dtb initrd /2504a9c37a434fc28843779e4d0b34eb/6.14.0-5-generic/initrd initrd /2504a9c37a434fc28843779e4d0b34eb/6.14.0-5-generic/initrd.img-6.14.0-5-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dracut/+bug/2100296/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
