I was able to reproduce the problem in an s390x lpar as follows:
$ uname -a
Linux special07 6.19.0-6-generic #6-Ubuntu SMP Wed Feb 18 14:47:53 UTC 2026
s390x GNU/Linux
$ sudo update-initramfs -u
update-initramfs: Generating /boot/initrd.img-6.19.0-6-generic
mkinitramfs: copy_file: binary '/usr/lib/udev/dmsetup_env' not found
Using config file '/etc/zipl.conf'
Run /usr/lib/s390-tools/zipl_helper.device-mapper 252:1
Building bootmap in '/boot'
Adding IPL section 'ubuntu' (default)
Run /usr/lib/s390-tools/zipl_helper.device-mapper 252:1
Run /usr/lib/s390-tools/zipl_helper.device-mapper 252:1
Preparing boot device: dm-1.
Done.
This reproduces the first problem `mkinitramfs: copy_file: binary
'/usr/lib/udev/dmsetup_env' not found`.
Since I was able to reproduce it without updating the kernel, the new kernel is
not the root cause.
In particular, this warning is caused by a command in the multipath-tools
initramfs hook:
`copy_exec /usr/lib/udev/dmsetup_env`
This command looks for `dmsetup_env` that according to the changelog has
been removed in version 0.8.8:
```
[ Chris Hofstaedtler ]
* [7fcb8ba] New upstream version 0.8.8
* [e63a379] Refresh patches
* [4ab9ce2] Drop old dmsetup_env hack
dmsetup long supports DM_NAME and DM_UUID, and the other variables
are not used anymore.
...
```
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https://bugs.launchpad.net/bugs/2142878
Title:
While upgrading to kernel 7.0.0-2.2 on resolute snapshot4, I am seeing
several readlink msg
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