Upgrading from 18.04 to 20.04 encrypted installation with LUKS and LVM makes it unbootable without manual intervention

[Serhiy]

Volume Group metadata had to be upgraded manually with

vgck --updatemetadata yourvgname

The VG name was somehow changed from lvm-name to just name and I had to edit /etc/crypttab and update-initramfs -u -k all

Also cryptsetup-initramfs package was deleted for some reason, had to re-install it in chroot. Maybe it happened because I have disabled installing recommended and suggested packages or maybe because none of *buntu-desktop packages are installed on my system. Not sure if I have to report it as a separate problem, please advise.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: lvm2 2.03.07-1ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
Uname: Linux 5.4.0-29-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Fri May 8 01:35:04 2020
SourcePackage: lvm2
UpgradeStatus: No upgrade log present (probably fresh install)

[Brian Murray (brian-murray)]

Please include the log files from your upgrade, which can be found in '/var/log/dist-upgrade', to this bug report. Running 'apport-collect 1877473' should do this automatically. Thanks in advance!

[Serhiy (xintx-ua)]

Can't. /var/log is in tmpfs and I didn't save them unfortunately. Feel free to close this as a duplicate of https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1874381