Comment 1 for bug 1965766

I can confirm that the zfcpdump-kernel package in version 5.15-0ubuntu1 located in jammy-proposed works fine on s390x.
I've dumped using an LPAR loading the previously prepared LUN that incl. the dumper.
A proper dump was written, that can be read, opened and analyzed.

$ apt-cache policy zfcpdump-kernel
zfcpdump-kernel:
  Installed: 5.15-0ubuntu1
  Candidate: 5.15-0ubuntu1
  Version table:
 *** 5.15-0ubuntu1 500
        500 http://us.ports.ubuntu.com/ubuntu-ports jammy-proposed/universe s390x Packages
        100 /var/lib/dpkg/status
     5.4-0ubuntu2 500
        500 http://ports.ubuntu.com/ubuntu-ports jammy/universe s390x Packages

$ sudo zgetdump -i /dev/mapper/mpatha-part1
General dump info:
  Dump format........: elf
  Version............: 1
  UTS node name......: zbox
  UTS kernel release.: 5.15.0-23-generic
  UTS kernel version.: #23-Ubuntu SMP Fri Mar 11 14:53:58 UTC 2022
  System arch........: s390x (64 bit)
  CPU count (online).: 8
  Dump memory range..: 32768 MB

Memory map:
  0000000000000000 - 00000007ffffffff (32768 MB)

(more details see attachment)