Public bug reported:
ubuntu@zlin:~$ apt-cache policy linux-image-$(uname -r)
linux-image-6.19.0-6-generic:
Installed: 6.19.0-6.6
Candidate: 6.19.0-6.6
Version table:
*** 6.19.0-6.6 500
500 http://ports.ubuntu.com/ubuntu-ports resolute/main s390x Packages
100 /var/lib/dpkg/status
ubuntu@zlin:~$ sudo add-apt-repository --yes ppa:canonical-kernel-team/unstable
Repository: 'Types: deb
URIs: https://ppa.launchpadcontent.net/canonical-kernel-team/unstable/ubuntu/
Suites: resolute
Components: main
'
Description:
CONFIGURED FOR DEVELOPMENT
Cowboy builders all the way.
More info: https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/unstable
Adding repository.
Press [ENTER] to continue or Ctrl-c to cancel.
Get:1 https://ppa.launchpadcontent.net/canonical-kernel-team/unstable/ubuntu
resolute InRelease [20.2 kB]
Hit:2 http://ports.ubuntu.com/ubuntu-ports resolute InRelease
Get:3 https://ppa.launchpadcontent.net/canonical-kernel-team/unstable/ubuntu
resolute/main s390x Packages [8,560 B]
Hit:4 http://ports.ubuntu.com/ubuntu-ports resolute-updates InRelease
Get:5 https://ppa.launchpadcontent.net/canonical-kernel-team/unstable/ubuntu
resolute/main Translation-en [8,188 B]
Hit:6 http://ports.ubuntu.com/ubuntu-ports resolute-backports InRelease
Hit:7 http://ports.ubuntu.com/ubuntu-ports resolute-security InRelease
Fetched 37.0 kB in 1s (44.4 kB/s)
Reading package lists... Done
ubuntu@zlin:~$ sudo apt install linux-image-7.0.0-2-generic=7.0.0-2.2
linux-modules-7.0.0-2-generic=7.0.0-2.2
Installing:
linux-image-7.0.0-2-generic linux-modules-7.0.0-2-generic
Suggested packages:
linux-unstable-tools linux-headers-7.0.0-2-generic
Summary:
Upgrading: 0, Installing: 2, Removing: 0, Not Upgrading: 0
Download size: 43.9 MB
Space needed: 95.0 MB / 181 GB available
Get:1 https://ppa.launchpadcontent.net/canonical-kernel-team/unstable/ubuntu
resolute/main s390x linux-modules-7.0.0-2-generic s390x 7.0.0-2.2 [33.3 MB]
Get:2 https://ppa.launchpadcontent.net/canonical-kernel-team/unstable/ubuntu
resolute/main s390x linux-image-7.0.0-2-generic s390x 7.0.0-2.2 [10.6 MB]
Fetched 43.9 MB in 47s (937 kB/s)
Selecting previously unselected package linux-modules-7.0.0-2-generic.
(Reading database ... 71022 files and directories currently installed.)
Preparing to unpack .../linux-modules-7.0.0-2-generic_7.0.0-2.2_s390x.deb ...
Unpacking linux-modules-7.0.0-2-generic (7.0.0-2.2) ...
Selecting previously unselected package linux-image-7.0.0-2-generic.
Preparing to unpack .../linux-image-7.0.0-2-generic_7.0.0-2.2_s390x.deb ...
Unpacking linux-image-7.0.0-2-generic (7.0.0-2.2) ...
Setting up linux-modules-7.0.0-2-generic (7.0.0-2.2) ...
Setting up linux-image-7.0.0-2-generic (7.0.0-2.2) ...
I: /boot/vmlinuz is now a symlink to vmlinuz-7.0.0-2-generic
I: /boot/initrd.img is now a symlink to initrd.img-7.0.0-2-generic
Processing triggers for linux-image-7.0.0-2-generic (7.0.0-2.2) ...
/etc/kernel/postinst.d/initramfs-tools:
update-initramfs: Generating /boot/initrd.img-7.0.0-2-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.
/etc/kernel/postinst.d/kdump-tools:
kdump-tools: Generating /var/lib/kdump/initrd.img-7.0.0-2-generic
readlink: /sys/devices/css0/0.0.007d/0.0.0002/host1/rport-1:0-1/target1:0:1/1:0:
1:1074348032/block/sdd/driver/module: No such file or directory
readlink: /sys/devices/css0/0.0.007d/0.0.0002/host1/rport-1:0-1/target1:0:1/1:0:
1:1074348032/block/driver/module: No such file or directory
readlink: /sys/devices/css0/0.0.007d/0.0.0002/host1/rport-1:0-1/target1:0:1/driv
er/module: No such file or directory
readlink: /sys/devices/css0/0.0.007d/0.0.0002/host1/rport-1:0-1/driver/module: N
o such file or directory
readlink: /sys/devices/css0/0.0.007d/0.0.0002/host1/driver/module: No such file
or directory
readlink: /sys/devices/css0/driver/module: No such file or directory
readlink: /sys/devices/driver/module: No such file or directory
readlink: /sys/devices/css0/0.0.007c/0.0.0001/host0/rport-0:0-1/target0:0:1/0:0:
1:1074348032/block/sdb/driver/module: No such file or directory
readlink: /sys/devices/css0/0.0.007c/0.0.0001/host0/rport-0:0-1/target0:0:1/0:0:
1:1074348032/block/driver/module: No such file or directory
readlink: /sys/devices/css0/0.0.007c/0.0.0001/host0/rport-0:0-1/target0:0:1/driv
er/module: No such file or directory
readlink: /sys/devices/css0/0.0.007c/0.0.0001/host0/rport-0:0-1/driver/module: N
o such file or directory
readlink: /sys/devices/css0/0.0.007c/0.0.0001/host0/driver/module: No such file
or directory
readlink: /sys/devices/css0/driver/module: No such file or directory
readlink: /sys/devices/driver/module: No such file or directory
readlink: /sys/devices/css0/0.0.007d/0.0.0002/host1/rport-1:0-0/target1:0:0/1:0:
0:1074348032/block/sdc/driver/module: No such file or directory
readlink: /sys/devices/css0/0.0.007d/0.0.0002/host1/rport-1:0-0/target1:0:0/1:0:
0:1074348032/block/driver/module: No such file or directory
readlink: /sys/devices/css0/0.0.007d/0.0.0002/host1/rport-1:0-0/target1:0:0/driv
er/module: No such file or directory
readlink: /sys/devices/css0/0.0.007d/0.0.0002/host1/rport-1:0-0/driver/module: N
o such file or directory
readlink: /sys/devices/css0/0.0.007d/0.0.0002/host1/driver/module: No such file
or directory
readlink: /sys/devices/css0/driver/module: No such file or directory
readlink: /sys/devices/driver/module: No such file or directory
readlink: /sys/devices/css0/0.0.007c/0.0.0001/host0/rport-0:0-0/target0:0:0/0:0:
0:1074348032/block/sda/driver/module: No such file or directory
readlink: /sys/devices/css0/0.0.007c/0.0.0001/host0/rport-0:0-0/target0:0:0/0:0:
0:1074348032/block/driver/module: No such file or directory
readlink: /sys/devices/css0/0.0.007c/0.0.0001/host0/rport-0:0-0/target0:0:0/driv
er/module: No such file or directory
readlink: /sys/devices/css0/0.0.007c/0.0.0001/host0/rport-0:0-0/driver/module: N
o such file or directory
readlink: /sys/devices/css0/0.0.007c/0.0.0001/host0/driver/module: No such file
or directory
readlink: /sys/devices/css0/driver/module: No such file or directory
readlink: /sys/devices/driver/module: No such file or directory
readlink: /sys/devices/virtual/block/dm-0/driver/module: No such file or directo
ry
readlink: /sys/devices/virtual/block/driver/module: No such file or directory
readlink: /sys/devices/virtual/driver/module: No such file or directory
readlink: /sys/devices/driver/module: No such file or directory
readlink: /sys/devices/virtual/block/dm-1/driver/module: No such file or directo
ry
readlink: /sys/devices/virtual/block/driver/module: No such file or directory
readlink: /sys/devices/virtual/driver/module: No such file or directory
readlink: /sys/devices/driver/module: No such file or directory
readlink: '/sys/class/extcon/*': No such file or directory
readlink: /sys/class/gpio/export/driver/module: Not a directory
readlink: /sys/class/gpio/driver/module: No such file or directory
readlink: /sys/class/driver/module: No such file or directory
readlink: /sys/class/gpio/unexport/driver/module: Not a directory
readlink: /sys/class/gpio/driver/module: No such file or directory
readlink: /sys/class/driver/module: No such file or directory
readlink: '/sys/class/phy/*': No such file or directory
readlink: '/sys/class/pwm/*': No such file or directory
readlink: '/sys/class/regulator/*': No such file or directory
readlink: '/sys/class/rtc/*': No such file or directory
readlink: '/sys/class/backlight/*': No such file or directory
readlink: /sys/devices/virtual/graphics/fbcon/driver/module: No such file or dir
ectory
readlink: /sys/devices/virtual/graphics/driver/module: No such file or directory
readlink: /sys/devices/virtual/driver/module: No such file or directory
readlink: /sys/devices/driver/module: No such file or directory
readlink: /sys/class/drm/version/driver/module: Not a directory
readlink: /sys/class/drm/driver/module: No such file or directory
readlink: /sys/class/driver/module: No such file or directory
mkinitramfs: copy_file: binary '/usr/lib/udev/dmsetup_env' not found
/etc/kernel/postinst.d/zz-zipl:
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.
Scanning processes...
Scanning processor microcode...
Scanning linux images...
Pending kernel upgrade!
Running kernel version:
6.19.0-6-generic
Diagnostics:
The currently running kernel version is not the expected kernel version
7.0.0-2-generic.
Restarting the system to load the new kernel will not be handled automatically,
so you should consider rebooting.
Failed to check for processor microcode upgrades.
No services need to be restarted.
No containers need to be restarted.
No user sessions are running outdated binaries.
No VM guests are running outdated hypervisor (qemu) binaries on this host.
ubuntu@zlin:~$ reboot
Call to Reboot failed: Access denied as the requested operation requires
interactive authentication. However, interactive authentication has not been
enabled by the calling program.
ubuntu@zlin:~$ sudo reboot
ubuntu@zlin:~$ Connection to zlin closed by remote host.
Connection to zlin closed.
user@workstation:~$ ssh ubuntu@zlin
Welcome to Ubuntu Resolute Raccoon (development branch) (GNU/Linux
7.0.0-2-generic s390x)
* Documentation: https://docs.ubuntu.com
* Management: https://landscape.canonical.com
* Support: https://ubuntu.com/pro
System information as of Fri 27 Feb 2026 05:14:49 PM UTC
System load: 0.33 Memory usage: 1% Processes: 177
Usage of /: 5.3% of 187.93GB Swap usage: 0% Users logged in: 0
Expanded Security Maintenance for Applications is not enabled.
0 updates can be applied immediately.
Enable ESM Apps to receive additional future security updates.
See https://ubuntu.com/esm or run: sudo pro status
Last login: Fri Feb 27 17:10:32 2026 from 10.172.66.67
ubuntu@zlin:~$ apt-cache policy linux-image-$(uname -r)
linux-image-7.0.0-2-generic:
Installed: 7.0.0-2.2
Candidate: 7.0.0-2.2
Version table:
*** 7.0.0-2.2 500
500
https://ppa.launchpadcontent.net/canonical-kernel-team/unstable/ubuntu
resolute/main s390x Packages
100 /var/lib/dpkg/status
ubuntu@zlin:~$
The installation of the snaptshot4 ISO itself was fine.
Could actually be kernel, updateinitramfs or apparmor ?
** Affects: ubuntu-z-systems
Importance: Medium
Assignee: Skipper Bug Screeners (skipper-screen-team)
Status: New
** Affects: linux (Ubuntu)
Importance: Medium
Status: New
** Tags: iso-testing s390x ubuntu-26.04
** Also affects: ubuntu-z-systems
Importance: Undecided
Status: New
** Changed in: ubuntu-z-systems
Assignee: (unassigned) => Skipper Bug Screeners (skipper-screen-team)
** Changed in: ubuntu-z-systems
Importance: Undecided => High
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Changed in: ubuntu-z-systems
Importance: High => Medium
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/2142878/+subscriptions
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