Why am I being thrown into an emergency shell when booting?












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I have set up Arch Linux with full-disk encryption and partitioned my system disk using LVM. I just changed the motherboard, CPU and RAM of my machine, and after enabling legacy boot and disabling secure boot it booted fine at least once — I was asked for the LUKS passphrase, the GRUB menu showed up, lightdm and Awesome WM started fine, and I used the system for some hours. Next time I booted the LUKS prompt showed up, and I got the GRUB menu, but shortly afterwards my screen looked like this:



Starting version 241.7-2-arch
ERROR: device '/dev/mapper/vg-root' not found. Skipping fsck.
mount: /new_root: no filesystem type specified.
You are now being dropped into an emergency shell.
sh: can't access tty: job control turned off
[rootfs ]#


The really weird thing is that /dev/mapper/vg-root clearly does exist: I was able to mount it, mount my home directory within it, chroot to it and see all my files, and finally when I ran reboot outside the chroot it took me straight to the lightdm login screen. Why reboot would continue the boot rather than restart the machine is beyond me, but might just be a red herring.



What is going on here? Is there some known issue with this version of systemd?









share



























    0















    I have set up Arch Linux with full-disk encryption and partitioned my system disk using LVM. I just changed the motherboard, CPU and RAM of my machine, and after enabling legacy boot and disabling secure boot it booted fine at least once — I was asked for the LUKS passphrase, the GRUB menu showed up, lightdm and Awesome WM started fine, and I used the system for some hours. Next time I booted the LUKS prompt showed up, and I got the GRUB menu, but shortly afterwards my screen looked like this:



    Starting version 241.7-2-arch
    ERROR: device '/dev/mapper/vg-root' not found. Skipping fsck.
    mount: /new_root: no filesystem type specified.
    You are now being dropped into an emergency shell.
    sh: can't access tty: job control turned off
    [rootfs ]#


    The really weird thing is that /dev/mapper/vg-root clearly does exist: I was able to mount it, mount my home directory within it, chroot to it and see all my files, and finally when I ran reboot outside the chroot it took me straight to the lightdm login screen. Why reboot would continue the boot rather than restart the machine is beyond me, but might just be a red herring.



    What is going on here? Is there some known issue with this version of systemd?









    share

























      0












      0








      0








      I have set up Arch Linux with full-disk encryption and partitioned my system disk using LVM. I just changed the motherboard, CPU and RAM of my machine, and after enabling legacy boot and disabling secure boot it booted fine at least once — I was asked for the LUKS passphrase, the GRUB menu showed up, lightdm and Awesome WM started fine, and I used the system for some hours. Next time I booted the LUKS prompt showed up, and I got the GRUB menu, but shortly afterwards my screen looked like this:



      Starting version 241.7-2-arch
      ERROR: device '/dev/mapper/vg-root' not found. Skipping fsck.
      mount: /new_root: no filesystem type specified.
      You are now being dropped into an emergency shell.
      sh: can't access tty: job control turned off
      [rootfs ]#


      The really weird thing is that /dev/mapper/vg-root clearly does exist: I was able to mount it, mount my home directory within it, chroot to it and see all my files, and finally when I ran reboot outside the chroot it took me straight to the lightdm login screen. Why reboot would continue the boot rather than restart the machine is beyond me, but might just be a red herring.



      What is going on here? Is there some known issue with this version of systemd?









      share














      I have set up Arch Linux with full-disk encryption and partitioned my system disk using LVM. I just changed the motherboard, CPU and RAM of my machine, and after enabling legacy boot and disabling secure boot it booted fine at least once — I was asked for the LUKS passphrase, the GRUB menu showed up, lightdm and Awesome WM started fine, and I used the system for some hours. Next time I booted the LUKS prompt showed up, and I got the GRUB menu, but shortly afterwards my screen looked like this:



      Starting version 241.7-2-arch
      ERROR: device '/dev/mapper/vg-root' not found. Skipping fsck.
      mount: /new_root: no filesystem type specified.
      You are now being dropped into an emergency shell.
      sh: can't access tty: job control turned off
      [rootfs ]#


      The really weird thing is that /dev/mapper/vg-root clearly does exist: I was able to mount it, mount my home directory within it, chroot to it and see all my files, and finally when I ran reboot outside the chroot it took me straight to the lightdm login screen. Why reboot would continue the boot rather than restart the machine is beyond me, but might just be a red herring.



      What is going on here? Is there some known issue with this version of systemd?







      arch-linux systemd boot lvm





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      asked 1 min ago









      l0b0l0b0

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