The maintainer script becomes a zombie, because perl -w ... debconf/frontend ... memtest86+.postinst is stuck in a read() from fd 9, which is a pipe.
** Package changed: memtest86+ (Ubuntu) => ubuntu ** Package changed: ubuntu => debconf (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to debconf in Ubuntu. https://bugs.launchpad.net/bugs/1876506 Title: eoan to focal upgrade hangs when lvm snapshot is present Status in debconf package in Ubuntu: Confirmed Status in debconf source package in Focal: Confirmed Bug description: 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/debconf/+bug/1876506/+subscriptions -- 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
