cryptsetup open from live usb failing

Dyslexic8880

3/17/24, 8:59 PM

I chose to encrypt during install (Ubuntu 22.04). All that works as expected. But the swap partition it made is too small for hibernation usually. It made a 1.9GiB part, I have 16G ram (thinkpad t480).

Hibernate is technically working. It’ll hibernate and resume successfully if I’m only running the DE and terminal. Since the installer already made this logical swap part and grub will resume from it, I’d rather just grow the part than switch to a swapfile and update grub to offset/resume from that.

But I can’t get my encrypted root open from the live usb to do that. The error is No key available with this passphrase. The usb and the real OS are both set to US keyboard and I’m certain I’m typing it correctly, no caps lock etc. Same issue whether I try from cli or Disks gui.

Using (as root from the live usb) cryptsetup open /dev/nvme0n1p3 vgubuntu-root tried variations like luksOpen or different mapper names like ubuntu, crypt, root. Pointing at other partitions says Not a LUKS device.

lsblk

nvme0n1        259:0    0 476.9G  0 disk  
├─nvme0n1p1    259:1    0   512M  0 part  /boot/efi
├─nvme0n1p2    259:2    0   1.7G  0 part  /boot
└─nvme0n1p3    259:3    0 474.8G  0 part  
  └─nvme0n1p3_crypt
               253:0    0 474.8G  0 crypt 
    ├─vgubuntu-root
    │          253:1    0 472.8G  0 lvm   /var/snap/firefox/common/host-hunspell
    │                                     /
    └─vgubuntu-swap_1
               253:2    0   1.9G  0 lvm   [SWAP]

What might be going on here / what kinda troubleshooting to try or other outputs to post?

0 + 0

encryption

hibernate

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