Public bug reported: Using Lubuntu 18.04.2 (#lsb_release -a -> Description: Ubuntu 18.04.2 LTS)
In order to resolve a problem with booting after 'Software Updater' updated the system, I needed to boot from a LiveCD and chroot to resolve the boot issue. GRUB allows systems to boot from an ISO image located on an accessible filesystem, so if you have sufficient disk space, you do not need to write out to a USB flash drive. I downloaded the Lubuntu 18.0.2 from http://cdimage.ubuntu.com/lubuntu/releases/18.04.2/release/ onto a spare partition formatted as UDF version 2.0.1 and confirmed the integrity of the download with sha256sum On attempting to boot from the ISO directly using GRUB, the boot fails. As I don't have a serial console I can't give the exact error. As I knew I could boot from other ISO images on a separate ext2 partition, I copied the Lubuntu 18.04.2 ISO to the ext2 partition. Attempting to boot with the ISO in this location worked, I got a LiveCD system from which I could then do the necessary chroot operations to get my system working again. GRUB script - fails when ISO is on UDF formatted partition, succeeds when on ext2 partition setparams 'Lubuntu 18.04.2 ISO' insmod iso9660 insmod ext2 insmod udf insmod part_gpt set isofile="/lubuntu-18.04.2-desktop-amd64.iso" loopback loop (hd1,gpt5)$isofile linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=$isofile noprompt noeject toram -- initrd (loop)/casper/initrd I suspect the iso has been produced without including udf filesystem drivers somewhere. I suggest supporting UDF would be helpful as many people use UDF as a cross-platform alternative to FAT as it supports larger file sizes than FAT. ** Affects: ubuntu Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1820222 Title: Unable to boot LiveCD ISO from UDF filesystem To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1820222/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
