I wasn't able to re-create this on my LPAR (also using zFCP storage, installed with subiquity):
$ apt-cache policy s390-tools-zkey s390-tools-zkey: Installed: (none) Candidate: 2.12.0-0ubuntu3 Version table: 2.12.0-0ubuntu3 500 500 http://ports.ubuntu.com/ubuntu-ports focal/main s390x Packages 500 http://us.ports.ubuntu.com/ubuntu-ports focal/main s390x Packages $ sudo apt install s390-tools-zkey Reading package lists... Done Building dependency tree Reading state information... Done The following NEW packages will be installed: s390-tools-zkey 0 upgraded, 1 newly installed, 0 to remove and 1 not upgraded. Need to get 98.6 kB of archives. After this operation, 393 kB of additional disk space will be used. Get:1 http://ports.ubuntu.com/ubuntu-ports focal/main s390x s390-tools-zkey s390x 2.12.0-0ubuntu3 [98.6 kB] Fetched 98.6 kB in 0s (372 kB/s) Selecting previously unselected package s390-tools-zkey. (Reading database ... 144203 files and directories currently installed.) Preparing to unpack .../s390-tools-zkey_2.12.0-0ubuntu3_s390x.deb ... Unpacking s390-tools-zkey (2.12.0-0ubuntu3) ... Setting up s390-tools-zkey (2.12.0-0ubuntu3) ... Adding group `zkeyadm' (GID 119) ... Done. Processing triggers for man-db (2.9.1-1) ... Processing triggers for initramfs-tools (0.136ubuntu6) ... update-initramfs: Generating /boot/initrd.img-5.4.0-29-generic Using config file '/etc/zipl.conf' Run /lib/s390-tools/zipl_helper.device-mapper /boot Building bootmap in '/boot' Adding IPL section 'ubuntu' (default) Preparing boot device: dm-0. Done. $ sudo apt install s390-tools-zkey Reading package lists... Done Building dependency tree Reading state information... Done s390-tools-zkey is already the newest version (2.12.0-0ubuntu3). 0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded. $ sudo apt install --reinstall s390-tools-zkey Reading package lists... Done Building dependency tree Reading state information... Done 0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 1 not upgraded. Need to get 98.6 kB of archives. After this operation, 0 B of additional disk space will be used. Get:1 http://ports.ubuntu.com/ubuntu-ports focal/main s390x s390-tools-zkey s390x 2.12.0-0ubuntu3 [98.6 kB] Fetched 98.6 kB in 0s (376 kB/s) (Reading database ... 144213 files and directories currently installed.) Preparing to unpack .../s390-tools-zkey_2.12.0-0ubuntu3_s390x.deb ... Unpacking s390-tools-zkey (2.12.0-0ubuntu3) over (2.12.0-0ubuntu3) ... Setting up s390-tools-zkey (2.12.0-0ubuntu3) ... Processing triggers for man-db (2.9.1-1) ... Processing triggers for initramfs-tools (0.136ubuntu6) ... update-initramfs: Generating /boot/initrd.img-5.4.0-29-generic Using config file '/etc/zipl.conf' Run /lib/s390-tools/zipl_helper.device-mapper /boot Building bootmap in '/boot' Adding IPL section 'ubuntu' (default) Preparing boot device: dm-0. Done. $ $ apt-cache policy cryptsetup cryptsetup: Installed: 2:2.2.2-3ubuntu2 Candidate: 2:2.2.2-3ubuntu2 Version table: *** 2:2.2.2-3ubuntu2 500 500 http://ports.ubuntu.com/ubuntu-ports focal/main s390x Packages 500 http://us.ports.ubuntu.com/ubuntu-ports focal/main s390x Packages 100 /var/lib/dpkg/status Did that happen on a system that was installed with d-i legacy or with subiquity? And I cannot find any indication that a package related to this (like initramfs-tools or cryptsetup) was updated after 20.04 release. There was a cryptsetup ticket short before 20.04 GA (LP 1864360), but it looks unrelated to this... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1874138 Title: Installing package s390-tools-zkey reports cryptsetup: ERROR: Couldn't resolve device To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/s390-tools/+bug/1874138/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs