mjhjmtu

I got my new laptop and I installed Debian 9 Testing alongside OEM'd Windows 10.

I did not encrypt the whole Debian partition, i managed to encrypt the /home and /swap only (not sure if reasonable, but I did it that way...).

Now, when I reach grub on startup and select Debian my system is stuck in a ~30 seconds boot loop where

(NCRYPT is my LVM volume name)

Volume group "NCRYPT" not found
Cannot process volume group NCRYPT

is printed over and over until

Gave up waiting for suspend/resume device

And then I'm able to insert my passphrase, decipher the encrypted partition, and reach the lightdm where i can log in the new session.

Checking out journalctl I found out that, at some point, this is printed:

ct 07 10:12:15 debian kernel: random: lvm: uninitialized urandom read (4 bytes read)
Oct 07 10:12:15 debian kernel: random: lvm: uninitialized urandom read (4 bytes read)
Oct 07 10:12:15 debian kernel: random: lvm: uninitialized urandom read (4 bytes read)
Oct 07 10:12:15 debian kernel: random: lvm: uninitialized urandom read (4 bytes read)
Oct 07 10:12:15 debian kernel: random: lvm: uninitialized urandom read (4 bytes read)
Oct 07 10:12:15 debian kernel: random: lvm: uninitialized urandom read (4 bytes read)
Oct 07 10:12:15 debian kernel: random: lvm: uninitialized urandom read (4 bytes read)
Oct 07 10:12:15 debian kernel: random: lvm: uninitialized urandom read (4 bytes read)

Grep-ing "NCRYPT" gives me:

pagano@debian:~$ sudo journalctl | grep NCRYPT
Oct 07 10:12:24 debian lvm[681]: 2 logical volume(s) in volume group "NCRYPT" now active
Oct 07 10:12:24 debian systemd[1]: Found device /dev/mapper/NCRYPT-swap.
Oct 07 10:12:24 debian systemd[1]: Found device /dev/mapper/NCRYPT-home.
Oct 07 10:12:24 debian systemd[1]: Activating swap /dev/mapper/NCRYPT-swap...
Oct 07 10:12:24 debian kernel: Adding 7811068k swap on /dev/mapper/NCRYPT-swap. Priority:-2 extents:1 across:7811068k SSFS
Oct 07 10:12:24 debian systemd[1]: Activated swap /dev/mapper/NCRYPT-swap.
Oct 07 10:12:24 debian lvm[697]: 2 logical volume(s) in volume group "NCRYPT" monitored
Oct 07 10:12:24 debian systemd[1]: Starting File System Check on /dev/mapper/NCRYPT-home...
Oct 07 10:12:24 debian systemd-fsck[700]: /dev/mapper/NCRYPT-home: clean, 10766/3530752 files, 1531219/14116864 blocks
Oct 07 10:12:24 debian systemd[1]: Started File System Check on /dev/mapper/NCRYPT-home.

This is the output of my /etc/fstab:

pagano@debian:~$ cat /etc/fstab 
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/nvme0n1p4 during installation
UUID=4b84cf4f-9124-408e-8047-ce57465d0cd9 / ext4 errors=remount-ro 0 1
# /boot/efi was on /dev/nvme0n1p1 during installation
UUID=C880-B670 /boot/efi vfat umask=0077 0 1
/dev/mapper/NCRYPT-home /home ext4 defaults 0 2
/dev/mapper/NCRYPT-swap none swap sw 0 0

This is the output of /etc/crypttab:

sudo cat /etc/crypttab 
nvme0n1p5_crypt UUID=24276de5-4748-4695-973c-600506de6068 none luks

... and these are blkid ...

sudo blkid -c /dev/null -o list
device fs_type label mount point UUID

 /dev/nvme0n1
 (in use)
 /dev/nvme0n1p1
 vfat SYSTEM /boot/efi C880-B670
 /dev/nvme0n1p2
 (not mounted)
 /dev/nvme0n1p3
 ntfs Windows (not mounted) 2CFC870DFC86D10E
 /dev/nvme0n1p4
 ext4 / 4b84cf4f-9124-408e-8047-ce57465d0cd9
 /dev/nvme0n1p5
 crypto_LUKS (in use) 24276de5-4748-4695-973c-600506de6068
 /dev/mapper/nvme0n1p5_crypt
 LVM2_member (in use) xjeWlz-bxzP-cjmp-Pxdd-3wSP-YUsg-TMpczg
 /dev/mapper/NCRYPT-swap
 swap [SWAP] 574eb521-71bf-44e5-9ceb-af8e34bd64a2
 /dev/mapper/NCRYPT-home
 ext4 /home 30fb1988-212c-4887-ba27-6d9fddc539cd

... and lsblk :

sudo lsblk -o name,uuid,mountpoint
NAME UUID MOUNTPOINT
nvme0n1 
├─nvme0n1p1 C880-B670 /boot/efi
├─nvme0n1p2 
├─nvme0n1p3 2CFC870DFC86D10E 
├─nvme0n1p4 4b84cf4f-9124-408e-8047-ce57465d0cd9 /
└─nvme0n1p5 24276de5-4748-4695-973c-600506de6068 
 └─nvme0n1p5_crypt xjeWlz-bxzP-cjmp-Pxdd-3wSP-YUsg-TMpczg 
 ├─NCRYPT-swap 574eb521-71bf-44e5-9ceb-af8e34bd64a2 [SWAP]
 └─NCRYPT-home 30fb1988-212c-4887-ba27-6d9fddc539cd /home

What can I do to fix this behaviour?