Comment 19 for bug 1365874

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Simon Iremonger (ubuntu-iremonger) wrote :

FWIW, As was discussed, I checked into Grub2 and os-prober in older supported ubuntu (which may have similar incompatibility to e2fsprogs, thereby creating a multibooting issue with 18.04).
After experimenting carefully with a 14.04+16.04+18.04 (GA kernels, no HWE specifically) BIOS-style triple boot, can confirm the grub ext4 support is all cross-compatible (14.04 can autodetect and boot 64bit,metadata_csum 18.04 from its' own grub2).

However, e2fsprogs is DEFINITELY an issue as above, definitely worth sorting-out whatever-happens to the 18.04 default filesystem options, in my view.