After another automatic software update of grub: Extract from /var/log/apt/history.log
Start-Date: 2021-06-20 23:13:33 Commandline: aptdaemon role='role-commit-packages' sender=':1.135' Upgrade: ..., grub-efi-amd64-signed:amd64 (1.167~18.04.3+2.04-1ubuntu44.1, 1.167~18.04.5+2.04-1ubuntu44.1.2), ... End-Date: 2021-06-20 23:16:23 The grub,cfg on the EFI System Partition at /boot/efi/EFI/Ubuntu/grub.cfg was replaced with a new version. I had edited the old version to include a necessary 'cryptomount' as the first line Previous version cryptomount -u <partition uuid without hyphens> search.fs_uuid <filesystem uuid of /boot filesystem, with hyphens> root lvmid/<lvmid of volume group contining /boot filesystem> set prefix=($root)'/grub' configfile $prefix/grub.cfg This was replaced by a grub.cfg that lacked the first line search.fs_uuid <filesystem uuid of /boot filesystem, with hyphens> root lvmid/<lvmid of volume group contining /boot filesystem> set prefix=($root)'/grub' configfile $prefix/grub.cfg This obviously prevents successful booting. This did not happen on previous upgrades before this bug was raised, so a breaking change* has occurred to the scripts that both generate a working grub.cfg and place it in the relevant place. Anyone who doesn't know their way around the grub command line and understand the use of cryptomount and lvm would have a very difficult time resolving the problem. The quick resolution is 1) At the grub> prompt enter 'cryptomount -a', and provide the necessary passphrase 2) Point linux at the correct place: linux (lvm/<lvm volume that contains the boot filesystem>>)/<path to vmlinux> 3) Point initrd at the correct place: initrd (lvm/<volume group that contains the boot filesystem)/<path to initrd> 4) boot 5) Edit the new grub.cfg or replace with the old one. *The breaking change appears to be that the script no longer correctly handles the encrypted partition. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1927857 Title: Update to grub 2.04-1ubuntu44 breaks booting To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2-unsigned/+bug/1927857/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
