Comment # 8 on bug 985346 from James Ye

There appears to be multiple issues at play here:

1. YaST creates a different partition set-up with the same selected options
when there are already partitions on the disk. This causes the different
outcomes of install.

2. YaST attempts to create a too small btrfs partition in some circumstances.
This causes the install failure.

3. GRUB is unable to boot with cryptodisk (maybe to do with UEFI Secure Boot?).
This causes "error: Couldn't load sha256 hash." and "error: no such cryptodisk
foud."

I tested this in a KVM virtual machine using a 20GB virtual disk, using OVMF
with Secure Boot. The partition setup I used each time in "Edit proposal
settings" was to use encryption, do not create a separate /home and use btrfs
for root.

On the first install (with a blank disk), the partitioner automatically created
an EFI System Partition, a 400MB /boot, and a LVM+LUKS container with / and
swap. This installed and was booted successfully.

On the second install, the partitioner automatically created an EFI System
Partition, NO /boot partition, and the LVM+LUKS container. This installed
successfully but does NOT boot, resulting in the GRUB sha256 hash error.

On the third install, the same partitions are created as the first install.
However, I manually overrided to partitioner to create the second partition
setup, and also disabled Secure Boot in the firmware and in bootloader
settings. This also failed to boot after install.

Additionally, I noticed that after the third install the stub grub.cfg in the
ESP had different UUIDs for the disk... Also I was able to boot my executing
grubx64.efi from the EFI shell. So I think there are issues installing when
overwriting an existing system.



To sum up, the following scenarios can occur:

A normal >= 400MB /boot partition is created and everything works. (VM, first
install)

A small (illegal) ~156MB /boot partition is created and the install fails. (My
laptop)

No /boot partition is created. The system cannot boot. (VM second and third
installs)