[Bug 1034734] Re: flash-kernel shouldn't prompt the user when updating initramfs in case there's no valid /etc/fstab

[Oliver Grawert]

this happens because the current default for omap and omap4 in /usr/share/flash-kernel/db/all.db is 
Bootloader-sets-root: no

it is actually supposed to fail if it cant properly  set the root
parameter.

i plan to upload a change this week that will:

a) pull a default cmdline parameter from /etc/default/flash-kernel (usually configured by flash-kernel-installer)
b) will switch Bootloader-sets-root to yes for all arches we support in ubuntu which will avoid this behavior. 

the Bootloader-sets-root: no actually assumes that there is always an
initramfs (the root parameter is hardcoded in there from fstab) which we
want to avoid in ubuntu.

you should also consider setting FLASH_KERNEL_SKIP in chrooting scripts
like l-m-c, this will make update-initramfs and the kernel package
postinst scripts skip the flash-kernel hooks completely

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https://bugs.launchpad.net/bugs/1034734

Title:
  flash-kernel shouldn't prompt the user when updating initramfs in case
  there's no valid /etc/fstab

Status in “flash-kernel” package in Ubuntu:
  Confirmed

Bug description:
  Flash-kernel initramfs-tools hook, initramfs-
  tools/hooks/flash_kernel_set_root, doesn't know how to handle the use
  case where there's no valid rootfs device at /etc/fstab.

  This was noticed when using linaro-media-create, as the fstab is only
  available at the last step of the rootfs setup, prompting the message
  to the user and blocking until control+d or enter is entered by the
  user.

  This can also happen in case the user installs a valid kernel package
  + flash-kernel in a chroot.

  Flash-kernel should just warn the user and move on, and just block in
  case there's a valid rootfs at /etc/fstab and the device can't be
  found.

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