Comment 95 for bug 1768230

This looks likely to be some kind of incompatibility with full-disk encrypted systems. I just spotted that the errors I am getting are not about the swap partition at all, but instead about /dev/mapper/xubuntu--vg-root, which is the encrypted root. From /etc/fstab:

/dev/mapper/xubuntu--vg-root / ext4 errors=remount-ro 0 1