after a bit more of testing, i found that this occurs only on shutdown (gnome shutdown button, shutdown -h now, halt), not if i let ubuntu reboot and power off the system manually before grub starts.
-- root FS not cleanly unmounted on SSD https://bugs.launchpad.net/bugs/260807 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs