This bug is awaiting verification that the linux-oem-6.14/6.14.0-1003.3
kernel in -proposed solves the problem. Please test the kernel and
update this bug with the results. If the problem is solved, change the
tag 'verification-needed-noble-linux-oem-6.14' to 'verification-done-
noble-linux-oem-6.14'. If the problem still exists, change the tag
'verification-needed-noble-linux-oem-6.14' to 'verification-failed-
noble-linux-oem-6.14'.


If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.


See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: kernel-spammed-noble-linux-oem-6.14-v2 
verification-needed-noble-linux-oem-6.14

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/2104297

Title:
  not able to install a Power9 bare metal with Ubuntu 25.04 Plucky

Status in The Ubuntu-power-systems project:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Plucky:
  Fix Released

Bug description:
  [ Impact ]

  In ppc64el kernels, loading modules without any
  __patchable_function_entries section would fail due to a
  zero size allocation of executable memory for ftrace trampolines.
  This causes boot failures when trying to boot the kernel on IBM Power 9
  systems. In particular becasue IBM Power 9 tries to load i40e at boot
  time, which fails.

  The bug was introduced by commit eec37961a56a which landed in v6.13-rc1,
  which assumed all modules have traceable functions.

  [ Fix ]

  Apply the following patch:
  - 
https://lore.kernel.org/all/wlscshbqan2svtqkz5xc6v47tzndfnsvge7h4lbfn67zoplekl@elt2oxwhrp6f/T/
  which has not landed in linux-next yet.

  [ Test Plan ]

  Compile and boot test the kernel on a Power 9 bare metal machine.

  [ Where problems could occur ]

  The patch simply removes an if branch which handles (incorrectly) errors 
during
  module loading on ppc64 systems. The regression potential therefore is
  very low.

  -----

  Not able to netboot install a Power9 bare metal. It fails because it
  is not detecting network, after that the system goes to shell/busybox

  ```
  Begin: Waiting up to 180 secs for any network device to become available ... 
Failure: Network device did not appear in time
  done.
  dhcpcd-10.1.0 starting
  dev: loaded udev
  [  188.277865] 8021q: 802.1Q VLAN Support v1.8
  no valid interfaces found
  exiting due to oneshot
  aborting as link detection is disabled
  Sleeping 30 seconds before retrying getting a DHCP lease
  dhcpcd-10.1.0 starting
  dev: loaded udev
  no valid interfaces found
  exiting due to oneshot
  aborting as link detection is disabled
  dhcpcd exited
  Sleeping 60 seconds before retrying getting a DHCP lease
  dhcpcd-10.1.0 starting
  dev: loaded udev
  no valid interfaces found
  exiting due to oneshot
  aborting as link detection is disabled
  dhcpcd exited
  Sleeping 90 seconds before retrying getting a DHCP lease
  dhcpcd-10.1.0 starting
  dev: loaded udev
  no valid interfaces found
  exiting due to oneshot
  aborting as link detection is disabled
  dhcpcd exited
  Sleeping 120 seconds before retrying getting a DHCP lease

  BusyBox v1.37.0 (Ubuntu 1:1.37.0-4ubuntu1) built-in shell (ash)
  Enter 'help' for a list of built-in commands.

  (initramfs)
  ```

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