[Bug 2039468] Re: flash-kernel can't be properly disabled

[Heinrich Schuchardt]

Hello Juerg,

get_machine() and its caller would have to be changed in file
'functions'.

I wonder why you have to use 'none' in /etc/flash-kernel/machine. Could
you, please, describe your usage scenario. In which situation do you
have neither a valid value in /proc/device-tree/model nor in /etc/flash-
kernel/machine? What would write 'none' to /etc/flash-kernel/machine?

Would it help to return $? = 0 if /proc/device-tree/model does not
exist? This would allow to use the same image (with flash-kernel) both
on a system with ACPI as well as on one with a device-tree.

Best regards

Heinrich

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https://bugs.launchpad.net/bugs/2039468

Title:
  flash-kernel can't be properly disabled

Status in flash-kernel package in Ubuntu:
  New

Bug description:
  Per the man page:

  /etc/flash-kernel/machine
    If  present this can be used to override the machine autodetection. The contents must be a
    string which matches an entry in the database. Or `none' to disable flash-kernel.

  However, if that file contains 'none, flash-kernel bombs out with a
  non-0 exit status:

  $ cat /etc/flash-kernel/machine 
  none

  $ sudo flash-kernel 
  Unsupported platform 'none'.
  $ echo $?
  1

  If disabled, the exit status should be 0. Otherwise installation of
  packages that call flash-kernel in a postinst hook will fail.

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