In line 137 of file "10_linux":
rpool=`${grub_probe} --device ${GRUB_DEVICE} --target=fs_label
2>/dev/null || true`
The command run returns this error:
root@stream:/etc/grub.d# /usr/sbin/grub-probe --device /dev/nvme0n1p4
--target=fs_label
/usr/sbin/grub-probe: error: unknown filesystem.
The result makes ${rpool} NULL, and sets ${LINUX_ROOT_DEVICE} to
"ZFS=/ROOT/ubuntu_aaodxz"
This is clearly wrong and looks like the root cause of this issue.
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https://bugs.launchpad.net/bugs/1894101
Title:
ubuntu 20.04.1 installed with zfs root fails to boot after installing
xen-hypervisor
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