You have been subscribed to a public bug: When upgrading from 19.10 (w/ LVM + encypted disks) to 20.04, the installer hangs when trying to probe an LVM snapshot volume created before the upgrade.
Steps to reproduce: lvcreate -s -L 20G -n preupgrade /dev/vgubuntu/root do-release-upgrade -d The installer will hang after the following message: /usr/sbin/grub-probe: error: unknown filesystem. Found Ubuntu 19.10 (19.10) on /dev/mapper/vgubuntu-preupgrade done Resolution: Killing the grub-mount process which is probing the LVM snapshot seems to unhang the installer and allow the upgrade to complete without issue. ** Affects: debconf (Ubuntu) Importance: Critical Status: Confirmed ** Affects: debconf (Ubuntu Focal) Importance: Critical Status: Confirmed ** Tags: eoan2focal id-5ecfe91fc5987a8563b27f1f -- eoan to focal upgrade hangs when lvm snapshot is present https://bugs.launchpad.net/bugs/1876506 You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to debconf in Ubuntu. -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp