System unbootable after Manjaro update

Hello Community,

I am re-writting this support request after one day of trying to solve my problem - without success. I am not sure why the system got broken, it was crashed (black screen, blinking cursor) after lunch break. I remember a notification of updating a grub package what I did not start.

Since that, I was not able to restart/boot the system, grub reports a missing file - no matter which grub entry I selected (standard manjaro or failsafe nor any snapshot made with timeshift).

Today, I boot into a live-system where I could:

  • encrypt my disk
  • mount BTRFS-@ and my /boot/efi-partition
  • activate manjaro-chroot
  • ran grub-install and update-grub

After that, I even missed grub at system boot. Any idea? I think about these possible reasons, what do you think?

  • grub is set to hidden-mode
  • grub is not set up for crypted part. and/or btrfs and/or uefi

The good news, I could backup my data from BTRFS-@ after mounting it.

System-Setup:
1 disk, 5 partitions where #1 is boot-parition (EFI) and #4 is a encrypted, BTRFS partition (@,@HOME,@CACHE).

I appreciate any suggestion or idea to bring back my system to life, thanks.

Systemconfiguration:

pop-os@pop-os:~$ lsblk
NAME        MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINT
loop0         7:0    0   2.4G  1 loop  /rofs
sda           8:0    0 465.8G  0 disk  
└─sda2        8:2    0 232.8G  0 part  
sdb           8:16   0 931.5G  0 disk  
sdc           8:32   0 931.5G  0 disk  
sdd           8:48   1  57.3G  0 disk  
├─sdd1        8:49   1   2.5G  0 part  /cdrom
├─sdd2        8:50   1     4M  0 part  
└─sdd3        8:51   1  54.8G  0 part  /var/crash
sr0          11:0    1  1024M  0 rom   
nvme0n1     259:0    0 465.8G  0 disk  
├─nvme0n1p1 259:1    0   512M  0 part  
├─nvme0n1p2 259:2    0    16M  0 part  
├─nvme0n1p3 259:3    0 289.5G  0 part  
└─nvme0n1p4 259:4    0 175.8G  0 part  
  └─luks-11b06492-d035-4a2e-a585-de818c09d499
            253:0    0 175.8G  0 crypt /media/pop-os/429c90a5-f74d-4abd-ad4d-077
pop-os@pop-os:~$

/etc/fstab

# /dev/mapper/cryptroot
UUID=429c90a5-f74d-4abd-ad4d-077db6ffc8a1	/         	btrfs     	rw,noatime,compress=zstd:3,ssd,space_cache,commit=120,subvol=@	0 0

# /dev/nvme0n1p1 LABEL=SYSTEM
UUID=3A82-9CF6      	/boot/efi 	vfat      	rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro	0 0

# /dev/mapper/cryptroot
UUID=429c90a5-f74d-4abd-ad4d-077db6ffc8a1	/home     	btrfs     	rw,noatime,compress=zstd:3,ssd,space_cache,commit=120,subvol=@home	0 0

<=D=>