Canonical has confirmed a change in how Ubuntu 26.10 boots on devices with Secure Boot enabled, in an effort to reduce the the attack surface of the boot process. Ubuntu 26.10’s signed build of GRUB, which is only used on systems if Secure Boot is turned on, no longer supports /boot on Btrfs, XFS, ZFS, LVM, LUKS encryption or software RAID (other than RAID1). HFS+, Apple partition table support and JPEG and PNG image loading is also removed. Since GRUB needs to read the /boot directory to load the kernel and boot Ubuntu, if those files are on one of the affected […]
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