[Bug 1291434] Re: GRUB_CMDLINE_LINUX_DEFAULT contains duplicate options

[Nathan Stratton Treadway]

Also note that another set up duplicates is added to the line each time the grub-pc.postinst script is run -- on one of my Trusty systems I now see:
  GRUB_CMDLINE_LINUX_DEFAULT="nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw"

(I see that this value is also saved in the debconf database:
# debconf-show grub-pc | grep linux_cmdline_default
* grub2/linux_cmdline_default: nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw
)

I tracked the source of these two keywords to /etc/default/grub.d/dmraid2mdadm.cfg (part of the mdadm package), which contains the single line:
GRUB_CMDLINE_LINUX_DEFAULT="$GRUB_CMDLINE_LINUX_DEFAULT nomdmonddf nomdmonisw"

Perhaps that script needs to be expanded to check the current value of
$GRUB_CMDLINE_LINUX_DEFAULT and only add the new keywords if they aren't
already included?

Nathan

** Also affects: mdadm (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1291434

Title:
  GRUB_CMDLINE_LINUX_DEFAULT contains duplicate options

Status in “grub2” package in Ubuntu:
  Confirmed
Status in “mdadm” package in Ubuntu:
  New

Bug description:
  2014-03-12 - Today's trusty update installed grub-pc 2.02~beta2-7 and
  the linux default params were duplicated

  Instead of this:
  GRUB_CMDLINE_LINUX_DEFAULT="quiet splash elevator=deadline nomdmonddf nomdmonisw"
  It wanted to install this:
  GRUB_CMDLINE_LINUX_DEFAULT="quiet splash elevator=deadline nomdmonddf nomdmonisw nomdmonddf nomdmonisw"

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