diskimage-builder/releasenotes/notes/bootloader-commandline-d2db7524f1f9ad28.yaml
Ian Wienand f6a2452d4c Only append DIB_BOOTLOADER_DEFAULT_CMDLINE to default grub entry
The grub.cfg has two variables [1]

 GRUB_CMDLINE_LINUX : used on all boots
 GRUB_CMDLINE_LINUX_DEFAULT : additionally used on all "normal" boots

The problem with I2298675dda1f699c572b3423e7274bc8bd7c1c9d is that it
appened the values in DIB_BOOTLOADER_DEFAULT_CMDLINE to both of these,
resulting in duplicated arguments.  I don't think we considered that
GRUB_CMDLINE_LINUX_DEFAULT actually already appends to the
GRUB_CMDLINE_LINUX values.

Make DIB_BOOTLOADER_DEFAULT_CMDLINE only append itself to
GRUB_CMDLINE_LINUX_DEFAULT.  That seems to line up sensibly with the
name of the variable.

Documentation is enhanced around this, and a releasenote added.

[1] https://help.ubuntu.com/community/Grub2/Setup

Change-Id: I76b5442a9090c19a6540ed2d4ab324546f241ebf
Closes: #1791736
2018-09-13 09:51:50 +10:00

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YAML

---
other:
- It has been clarified that the ``DIB_BOOTLOADER_DEFAULT_CMDLINE``
variable appends its values to grubs
``GRUB_CMDLINE_LINUX_DEFAULT``, which is used during all normal
boots but not rescue boots; as opposed to applying to
``GRUB_CMDLINE_LINUX``