Bug#550319: escaping quotations in /etc/default/grub matters

[James Clark]

The following works for me:

/etc/default/grub containing:
GRUB_CMDLINE_LINUX="acpi_osi=\"Linux\""
generates the following line in /boot/grub/grub.cfg:
linux   /boot/vmlinuz-2.6.30-2-686 root=UUID=ashortfakeuuid ro
acpi_osi="Linux" quiet

I had originally used "acpi_osi="Linux"" without escaping the quotes
around Linux, meaning that the resulting grub.cfg file would contain
acpi=Linux (unquoted) and then that option was ignored during boot.

Put a #comment in /etc/default/grub to prompt the user that quotes
need escaping and that they should then inspect the resulting grub.cfg
satisfactory.  Something so simple would have saved quite some time
and frustration.