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After updating my PC to Ubuntu 18.04, I'm not able to mount my encrypted disk anymore.

Error unlocking /dev/sdb1: Failed to activate device: Operation not permitted

enter image description here

NAME                          FSTYPE      LABEL UUID                                   MOUNTPOINT
sda                                                                                    
├─sda1                        vfat              8219-4270                              /boot/efi
├─sda2                        ext2              bff8fdc5-c265-4eee-acad-0db6e4f44214   /boot
└─sda3                        crypto_LUKS       a32f0a9f-beef-4fb3-a0d6-f0e6926e37a3   
  └─sda3_crypt                LVM2_member       c0dGw1-IO3l-fWRN-0r2F-rrsj-pDfQ-6IXxPZ 
    ├─ubuntu--mate--vg-root   ext4              324101be-d34e-45c1-a902-43374373c3a6   /
    └─ubuntu--mate--vg-swap_1 swap              70eadd83-c37c-4f56-b41d-2956d296d85a   [SWAP]
sdb                                                                                    
└─sdb1                        crypto_LUKS       8e619d1d-9fb6-4314-923f-06bb64d86031   
sr0
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1 Answer 1

Reset to default
2

I got this error when I mis-typed my password.

Entered Correct password and my drive mounted just fine.

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3
  • 1
    Yeah… I've tried the correct passphrase several times…
    – qwertbert23
    Commented Jul 17, 2018 at 7:52
  • An unhelpful message when the only problem is a wrong password -- but that was the case for me too.
    – Brent Bradburn
    Commented Jan 22, 2019 at 20:32
  • 1
    Ah, Caps Lock, my old nemesis...
    – Tullo_x86
    Commented Feb 20, 2021 at 23:45

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