Problem still valid for version 2.02~beta2-36ubuntu11.
I'm using multi-device BTRFS as root file system.
Configuration generated by grub-install adds wrong kernel argument with newline:
linux /vmlinuz-4.4.0-62-generic root=/dev/mapper/sth--proc-root
/dev/mapper/sth--proc2-root ro rootflags=subvol=@ panic=30
but it should generate UUID (UUIDs are not disabled in my config):
linux /vmlinuz-4.4.0-62-generic
root=UUID=ed730508-753e-4a7f-ac1e-bf8646f7bd63 ro rootflags=subvol=@ panic=30
because of
# blkid
/dev/mapper/sth--proc2-root: LABEL="btrfs_root"
UUID="ed730508-753e-4a7f-ac1e-bf8646f7bd63"
UUID_SUB="3508e65d-22af-43c3-9fe6-446f63e203cc" TYPE="btrfs"
/dev/mapper/sth--proc-root: LABEL="btrfs_root"
UUID="ed730508-753e-4a7f-ac1e-bf8646f7bd63"
UUID_SUB="27c2248f-4072-4e3a-b782-99161460fcb2" TYPE="btrfs"
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https://bugs.launchpad.net/bugs/1238347
Title:
Invalid grub.cfg generated if root on RAID1 btrfs
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