https://bbs.archlinux.org – I've been trying to understand the generation of grub.cfg and the different options available in grub2's menu at boot time. It seems much more complicated than yaboot!/etc/default/grub contains lines for both GRUB_CMDLINE_LINUX and GRUB_CMDLINE_LINUX_DEFAULT.It seems that GRUB_CMDLINE_LINUX options are added to kernel command lines for all linux options? (HowTos)