(Sorry for accidentally hitting the wrong button earlier.)
Same problem here on a fresh installation of Xubuntu 17.10 on a Tuxedo
Book BU1406 (with Tuxedo-modifications tuxedo.sh ).
1 × M.2 SSD: 250 GB Samsung 960 EVO (/dev/nvme0n1).
1 × SATA III HDD: 1 TB Seagate Thin / 5400 rpm / 2.5" (/dev/sda).
Disk encryption with LUKS, dm-crypt and LVM are active.
The workaround from #15 seems to do the trick.
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System fails to start (boot) on battery due to read-only root file-
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