[Bug 2142878] Re: While upgrading to kernel 7.0.0-2.2 on resolute snapshot4, I am seeing several readlink msg

Athos Ribeiro 2142878 at bugs.launchpad.net
Thu Mar 26 11:41:00 UTC 2026 

rust-coreutils 0.7.0 was released in resolute. Frank, can you confirm
this is fixed now?

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Title:
  While upgrading to kernel 7.0.0-2.2 on resolute snapshot4, I am seeing
  several readlink msg

Status in Ubuntu on IBM z Systems:
  New
Status in initramfs-tools package in Ubuntu:
  New
Status in linux package in Ubuntu:
  New
Status in multipath-tools package in Ubuntu:
  New
Status in rust-coreutils package in Ubuntu:
  New

Bug description:
  ubuntu at zlin:~$ apt-cache policy linux-image-$(uname -r)
  linux-image-6.19.0-6-generic:
    Installed: 6.19.0-6.6
    Candidate: 6.19.0-6.6
    Version table:
   *** 6.19.0-6.6 500
          500 http://ports.ubuntu.com/ubuntu-ports resolute/main s390x Packages
          100 /var/lib/dpkg/status
  ubuntu at zlin:~$ 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 at 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 at 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 at zlin:~$ sudo reboot
  ubuntu at zlin:~$ Connection to zlin closed by remote host.
  Connection to zlin closed.
  user at workstation:~$ ssh ubuntu at 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 at zlin:~$ apt-cache policy linux-image-$(uname -r)
  linux-image-7.0.0-2-generic:
    Installed: 7.0.0-2.2
    Candidate: 7.0.0-2.2
    Version table:
   *** 7.0.0-2.2 500
          500 https://ppa.launchpadcontent.net/canonical-kernel-team/unstable/ubuntu resolute/main s390x Packages
          100 /var/lib/dpkg/status
  ubuntu at zlin:~$ 

  The installation of the snaptshot4 ISO itself was fine.

  Could actually be kernel, updateinitramfs or apparmor ?

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