Thanks for looking into this. I've been trying to validate the above fix, but I'm still seeing the same issue. In other words, Ubuntu Live still seems to bail out to the busybox console as soon as you use add 'persistent' to the Kernel options.
Here's what I did: - Extracted the content of http://cdimage.ubuntu.com/daily-live/current/eoan-desktop-amd64.iso to a FAT32 partition on an USB Flash drive - Added a 4 GB ext4 casper-rw partition to same drive (mkfs -L casper-rw -t ext4 /dev/sda2) - Because the current image is dated 2019.07.15, which may be older than your fix, I extracted casper/filesystem.squashfs from the USB media with unsquashfs to a temporary ./squashfs-root/ - I picked up http://archive.ubuntu.com/ubuntu/pool/main/c/casper/casper_1.413.tar.xz, and replaced ./squashfs-root/usr/share/initramfs-tools/scripts/ with the content of ./casper/scripts/ from that archive. - For good measure I also replaced the 4 files in ./squashfs-root/usr/share/casper/ with their latest version from ./casper/bin/ on the archive. - I then recreated the casper/filesystem.squashfs image with mksquashfs squashfs-root/ /mnt/usb_media/casper/filesystem.squashfs -noappend -always-use-fragments - I added 'persistent' to the kernel options in grub.cfg then tried to boot the media on a UEFI system The end result was still a boot failure with the message "mount: mounting /cow on /root failed: Invalid argument", and I'm pretty confident the same will hold true (without having to go through the whole squashfs update) with the next Live ISOs that is generated on http://cdimage.ubuntu.com/daily-live/current/, so I don't believe the issue has been properly fixed... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1489855 Title: Change to mount sequence order breaks persistence on casper-rw partitions To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/casper/+bug/1489855/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs