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#1 2021-06-15 08:22:24
- Number9Large
- Member
- Registered: 2021-06-15
- Posts: 1
Timeshift breaks system after restoring btrfs snapshot on luks
I have done a fresh Arch install using btrfs on a luks encrypted partition. For system snapshots i am using Timeshift.
Problem
After doing a new snapshot, restoring to that one, rebooting and unlocking the encrypted partition i get the following errors:
[FAILED] Failed to start User Login Management.
[FAILED] Failed to start User Login Management.
[FAILED] Failed to start User Login Management.
[FAILED] Failed to start User Login Management.
[FAILED] Failed to start User Login Management.
[FAILED] Failed to start Load Kernel Module drm.
[FAILED] Failed to start User Login Management.
[FAILED] Failed to start Hostname Service.The system is not bootable anymore.
I believe my system is supported by Timeshift, as it uses UEFI, btrfs with Ubuntu-like layout and grub2. (https://github.com/teejee2008/timeshift) But it does not work and i can't spot the reason 
What i have done so far
The first time of encountering the problem i thought i made a mistake with the btrfs layout. I did a complete reinstall, double checking that my layout is supported by timeshift. This time i made a full disk image using clonezilla before trying again. I tried restoring with timeshift again and got the same error. Right now i am restoring from the image.
I also didn't find a solution to the problem using google, maybe my setup is too specific or the error is somewhere else.
I found this sentence in the documentation, but i didn't understand what to do / how to do it. Maybe this is the error?
Make sure that /boot/efi partition is selected for mounting before restoring snapshots (application will do it automatically).
System Information
UEFI
boot loader: GRUB2
hard drive: nvme ssd
dual boot: no
swap encryption like this: https://wiki.archlinux.org/title/Dm-cry … _and_LABEL
The drive is partitioned in this way:
2048M - UEFI System - /boot
32G - swap - opened at /dev/mapper/cryptswap - /boot
1.8T - Linux Filesystem - opened at /dev/mapper/cryptroot - @ --> / and @home --> /home
In the fstab file i have used exclusively persistent naming by uuid.
I hope i supplied sufficient information 
Last edited by Number9Large (2021-06-15 08:42:14)
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