[Bug 2111521] Re: nvme no longer detected on boot after upgrade to 6.8.0-60

test13 boots OK, dmesg attached

** Attachment added: "LP2111521-dmesg-test13.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2111521/+attachment/5887410/+files/LP2111521-dmesg-test13.txt

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https://bugs.launchpad.net/bugs/2111521

Title:
nvme no longer detected on boot after upgrade to 6.8.0-60

Status in linux package in Ubuntu:
Triaged

Bug description:
Short version: booting 6.8.0-59-generic or any earlier version from
the grub menu works; 6.8.0-60-generic dumps me at the initramfs prompt
with no disks.

We have some servers running Ubuntu 24.04.2 LTS. They have NVME
solid-state disks which (in a working kernel) are detected as follows:

[ 3.537968] nvme nvme0: pci function 10000:01:00.0
[ 3.539285] nvme 10000:01:00.0: PCI INT A: no GSI
[ 5.897819] nvme nvme0: 32/0/0 default/read/poll queues
[ 5.905451] nvme nvme0: Ignoring bogus Namespace Identifiers
[ 5.909057] nvme0n1: p1 p2 p3

On the PCI bus they look like this:
10000:01:00.0 Non-Volatile memory controller [0108]: Intel Corporation NVMe Datacenter SSD [3DNAND, Beta Rock Controller] [8086:0a54]
$ ls -l /sys/class/nvme/nvme0
lrwxrwxrwx 1 root root 0 May 22 16:56 /sys/class/nvme/nvme0 -> ../../devices/pci0000:d7/0000:d7:05.5/pci10000:00/10000:00:02.0/10000:01:00.0/nvme/nvme0

Four identical servers updated their kernel this morning to:
ii linux-image-6.8.0-60-generic 6.8.0-60.63 amd64 Signed kernel image generic

...and rebooted. All four failed to come up and ended up at the
(initramfs) prompt. Rebooting and selecting 6.8.0-59-generic from the
grub menu allowed them to boot as normal.

There is no sign that the initramfs generation went wrong (on all four
servers) and the initramfs does contain all the same nvme modules for
-60 that the one for -59 does. I am at a loss to explain this, and
the initramfs environment is a bit limited for debugging.

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