I can confirm that the workaround suggested in #15 works for my Asus UX305CA, too. I attached my hdparm output...
** Attachment added: "hdparm.sda" https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1726930/+attachment/5045486/+files/hdparm.sda -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1726930 Title: System fails to start (boot) on battery due to read-only root file- system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/laptop-mode-tools/+bug/1726930/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs