For the record, the failing Debian machines run: Linux ci-worker-s390x-01 5.10.0-21-s390x #1 SMP Debian 5.10.162-1 (2023-01-21) s390x GNU/Linux The passing Launchpad builders run: Linux bos02-s390x-013 5.4.0-137-generic #154-Ubuntu SMP Thu Jan 5 17:03:11 UTC 2023 s390x