For a while my Ubuntu hasn't been booting anymore as it tells me to update the microcode. I've asked about it here but wasn't able to resolve it. I had my hard drive encrypted so I've decided to focus on just saving the data I have on there. This means I am trying to access a luks-encrypted partition using a live usb and running into a lot of problem.

  1. when I open GParted to look at the partition it tells me

The driver descriptor says the physical block size is 2048 bytes, but Linux says it is 512 bytes.

so far, I have followed most instructions on this thread

sudo cryptsetup luksOpen /dev/sda3 myvolume
Enter passphrase for /dev/sda3: 
ubuntu@ubuntu:~$ sudo mkdir /media/my_device
ubuntu@ubuntu:~$ sudo mount /dev/mapper/myvolume /media/my_device
mount: unknown filesystem type 'LVM2_member'
ubuntu@ubuntu:~$ sudo lvscan
  ACTIVE            '/dev/ubuntu-vg1/root' [229.59 GiB] inherit
  ACTIVE            '/dev/ubuntu-vg1/swap_1' [7.89 GiB] inherit
ubuntu@ubuntu:~$ sudo vgchange -ay
  2 logical volume(s) in volume group "ubuntu-vg1" now active
ubuntu@ubuntu:~$ sudo mount /dev/mapper/myvolume /media/my_device
mount: unknown filesystem type 'LVM2_member'
ubuntu@ubuntu:~$ sudo udisksctl mount -b /dev/mapper/ubuntu--vg1-root
Error mounting /dev/dm-1: GDBus.Error:org.freedesktop.UDisks2.Error.Failed: Error mounting /dev/dm-1 at /media/root/6f80dde8-85e9-4e1d-b3be-ea0a9d44f5f1: Command-line `mount -t "ext4" -o "uhelper=udisks2,nodev,nosuid" "/dev/dm-1" "/media/root/6f80dde8-85e9-4e1d-b3be-ea0a9d44f5f1"' exited with non-zero exit status 32: mount: wrong fs type, bad option, bad superblock on /dev/mapper/ubuntu--vg1-root,
       missing codepage or helper program, or other error

       In some cases useful info is found in syslog - try
       dmesg | tail or so.

dmesg | tail gives me:

[ 56.866350] wlp2s0: authenticate with cc:ce:1e:d7:2e:9b [
56.872017] wlp2s0: send auth to cc:ce:1e:d7:2e:9b (try 1/3) [ 56.877483] wlp2s0: authenticated [ 56.881185] wlp2s0: associate with cc:ce:1e:d7:2e:9b (try 1/3) [ 56.886601] wlp2s0: RX AssocResp from cc:ce:1e:d7:2e:9b (capab=0x431 status=0 aid=2) [ 56.889418] wlp2s0: associated [ 56.889452] IPv6: ADDRCONF(NETDEV_CHANGE): wlp2s0: link becomes ready [ 151.963132] NET: Registered protocol family 38 [ 748.825568] JBD2: journal file too short [ 748.825570] EXT4-fs (dm-1): error loading journal

I have also tried this with no success:

ubuntu@ubuntu:~$ udisksctl unlock -b /dev/sda3
Unlocked /dev/sda3 as /dev/dm-0.
ubuntu@ubuntu:~$ udisksctl mount -b /dev/dm-0
Object /org/freedesktop/UDisks2/block_devices/dm_2d0 is not a mountable filesystem.

Any advice on how to proceed? What would be the best next step to resolve this?

1 Answer 1


At long last, I've found the solution to this problem as it presented on my System 76 Gazelle: The Holy Grail Solution

  • 1
    While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference. Link-only answers can become invalid if the linked page changes. - From Review Apr 28 at 23:03

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.