[Bug 1802260] Missing required logs.

This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:

apport-collect 1802260

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1802260

Title:
Please include modules for NVMe and USB HID in pc-kernel snap initrd

Status in linux package in Ubuntu:
Incomplete

Bug description:
When trying Ubuntu Core with the pc-kernel snap, the system showed
'cannot find writable partition'. The system was stopped at the initrd
stage and didn't accept any input.

My system is using a NVMe disk and it seems the pc-kernel doesn't
provide the related modules in its initrd. Also, it's not possible to
enter the initramfs environment because of the lacking of USB HID
modules.

Is it possible to include these two categories of drivers in the
initrd of pc-kernel, please?

Verified both 4.4 and 4.15 (track 18) have the same issue.
$ squashfuse pc-kernel_162.snap pc-kernel
$ lsinitramfs pc-kernel/initrd.img |grep -E 'nvme|usbhid'
[nothing is showed]
$ fusermount -u pc-kernel
$ squashfuse pc-kernel_165.snap pc-kernel
$ lsinitramfs pc-kernel/initrd.img |grep -E 'nvme|usbhid'
[nothing is showed]
$ fusermount -u pc-kernel

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