let me show you steps which I did. Right after curtin installation (which fails see error in the first message of the thread), there are the following options in debconf for grub-pc:
# debconf-show grub-pc * grub-pc/install_devices_empty: false * grub-pc/cloud_style_installation: true * grub-pc/install_devices: /dev/disk/by-id/nvme-eui.00000000000000018ce38e01000a4355, /dev/disk/by-id/nvme-KXG60ZNV256G_TOSHIBA_31RY10BSYRU1 * grub-efi/cloud_style_installation: true Then I disable cloud_style_installation: # echo 'grub-pc grub-pc/cloud_style_installation select false' | debconf-set-selections # debconf-show grub-pc * grub-pc/install_devices_empty: false * grub-pc/install_devices: /dev/disk/by-id/nvme-eui.00000000000000018ce38e01000a4355, /dev/disk/by-id/nvme-KXG60ZNV256G_TOSHIBA_31RY10BSYRU1 * grub-pc/cloud_style_installation: false * grub-efi/cloud_style_installation: true and run dpkg-reconfigure. It shows dialog and 3 questions: * specify linux cmdline * parameters for default menu entry * enable os-prober or not and that's it, then it just exits with 0 code and nothing happens. The following options are set in debconf after it: # debconf-show grub-pc * grub-pc/cloud_style_installation: false * grub-efi/cloud_style_installation: true * grub2/linux_cmdline: * grub2/linux_cmdline_default: console=tty0 * grub-pc/install_devices_empty: false * grub-pc/install_devices: /dev/disk/by-id/nvme-eui.00000000000000018ce38e01000a4355, /dev/disk/by-id/nvme-KXG60ZNV256G_TOSHIBA_31RY10BSYRU1 * grub2/enable_os_prober: false I tried to reset all options or clear exactly 'grub-pc/install_devices'. It doesn't take an effect and dpkg-reconfigure doesn't ask to select devices: # echo RESET grub-pc/install_devices | debconf-communicate grub-pc 0 # dpkg-reconfigure grub-pc # debconf-show grub-pc * grub-pc/install_devices_empty: false * grub-efi/cloud_style_installation: true * grub2/linux_cmdline_default: console=tty0 * grub2/enable_os_prober: false * grub-pc/cloud_style_installation: false * grub2/linux_cmdline: -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2076329 Title: 24.04 grub-pc fails on dpkg-reconfigure To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/2076329/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs