[Bug 2097280] Re: /usr/sbin/mkinitramfs: 122: cannot open /sys/module/firmware_class/parameters/path: No such file

[Launchpad Bug Tracker]

** Merge proposal linked:
   https://code.launchpad.net/~mwhudson/livecd-rootfs/+git/livecd-rootfs/+merge/480649

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Title:
  /usr/sbin/mkinitramfs: 122: cannot open
  /sys/module/firmware_class/parameters/path: No such file

Status in initramfs-tools package in Ubuntu:
  Triaged
Status in livecd-rootfs package in Ubuntu:
  In Progress

Bug description:
  In the version of initramfs-tools now in plucky, mkinitramfs fails if
  /sys is not mounted. It is unclear if this is a real problem -- it
  broke some of our livefs builds but it turns out the update-initramfs
  calls were superfluous and could be avoided.

  Original description:

  The ISO build fails with initramfs-tools 0.145ubuntu1:

  ```
  update-initramfs: Generating /boot/initrd.img-6.12.0-12-generic
  /usr/sbin/mkinitramfs: 122: cannot open /sys/module/firmware_class/parameters/path: No such file
  /usr/sbin/mkinitramfs: 122: cannot open /sys/module/firmware_class/parameters/path: No such file
  /usr/sbin/mkinitramfs: 122: cannot open /sys/module/firmware_class/parameters/path: No such file
  /usr/sbin/mkinitramfs: 122: cannot open /sys/module/firmware_class/parameters/path: No such file
  /usr/sbin/mkinitramfs: 122: cannot open /sys/module/firmware_class/parameters/path: No such file
  /usr/share/initramfs-tools/hooks/casper: 122: cannot open /sys/module/firmware_class/parameters/path: No such file
  E: /usr/share/initramfs-tools/hooks/casper failed with return 2.
  update-initramfs: failed for /boot/initrd.img-6.12.0-12-generic with 2.
  ```

  Full log:
  https://launchpadlibrarian.net/774287312/buildlog_ubuntu_plucky_amd64_ubuntu-
  server-live_BUILDING.txt.gz

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