[Bug 1317153] Re: os-prober 90fallback - kernels detected out of order

[Mario Chamorro]

This should be a pretty simple patch to one file. I notice that I cannot
see this bug in Dimitri's assigned list. Is anyone going to look at
this?

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Title:
  os-prober 90fallback - kernels detected out of order

Status in “os-prober” package in Ubuntu:
  New

Bug description:
  Ubuntu information at the end of this message. When detecting kernels
  in other distributions like CentOS on the same disk, the kernels are
  incorrectly sorted numerically.

  e.g. this is the current incorrect jumbled result from grub-mkconfig:

  vmlinuz-2.6.32-358.23.2.el6.x86_64
  vmlinuz-2.6.32-431.11.2.el6.x86_64
  vmlinuz-2.6.32-431.1.2.0.1.el6.x86_64
  vmlinuz-2.6.32-431.3.1.el6.x86_64
  vmlinuz-2.6.32-431.5.1.el6.x86_64

  The correct order where the newest kernels are at the top is like so:

  vmlinuz-2.6.32-431.11.2.el6.x86_64
  vmlinuz-2.6.32-431.5.1.el6.x86_64
  vmlinuz-2.6.32-431.3.1.el6.x86_64
  vmlinuz-2.6.32-431.1.2.0.1.el6.x86_64
  vmlinuz-2.6.32-358.23.2.el6.x86_64

  To resolve this, /usr/lib/linux-boot-probes/mounted/90fallback needs
  to list them with the "-t" option:

    -t                         sort by modification time, newest first

  I've made the below change to my local 90fallback script and verified
  that the kernels are now listed in the correct order:

  22c22
  < 	for kernfile in $(eval ls "$mpoint$kernpat" 2>/dev/null); do
  ---
  > 	for kernfile in $(eval ls -t "$mpoint$kernpat" 2>/dev/null); do

  Please make this correction to os-prober so I do not have to manually modify /boot/grub/grub.cfg every time my multi-boot laptop gets new updated kernels. Thanks in advance.
  -- Mario Chamorro

  [mchamorr-ubuntu:~] lsb_release -rd
  Description:	Ubuntu 14.04 LTS
  Release:	14.04

  [mchamorr-ubuntu:~] apt-cache policy os-prober
  os-prober:
    Installed: 1.63ubuntu1
    Candidate: 1.63ubuntu1
    Version table:
   *** 1.63ubuntu1 0
          500 http://us.archive.ubuntu.com/ubuntu/ trusty/main i386 Packages
          100 /var/lib/dpkg/status
  [mchamorr-ubuntu:~]

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