Red Hat Bugzilla – Bug 827569
grubby updates the wrong config file on rEFIt (BIOS emulation) booted mac
Last modified: 2013-02-13 16:17:15 EST
Description of problem:
I am running Fedora 16 on a mac which is booted from rEFIt (BIOS emulator). I use grub2, and the /boot/grub2/grub.cfg config file. However, grubby updates /boot/grub2-efi/grub.cfg when it runs.
Version-Release number of selected component (if applicable):
Always, as long as /boot/grub2-efi exists.
Steps to Reproduce:
1. Run grubby to update grub config. For example, this was generated by preupgrade, when upgrading to Fedora 17:
/sbin/grubby --title="Upgrade to Fedora 17 (Beefy Miracle)" --remove-kernel="/boot/upgrade/vmlinuz" --add-kernel="/boot/upgrade/vmlinuz" --initrd="/boot/upgrade/initrd.img" --args="preupgrade repo=hd::/var/cache/yum/preupgrade ks=hd:UUID=35d59fb9-2c48-4e33-a8d3-c26776daa750:/upgrade/ks.cfg stage2=http://mirror.cc.vt.edu/pub/fedora/linux/releases/17/Fedora/x86_64/os/LiveOS/squashfs.img"
grubby modifies /boot/grub2-efi/grub.cfg
grubby modifies /boot/grub2/grub.cfg
Ways in which you might detect this:
*Follow the symlink from /etc: e.g. on my system
/etc/grub2.cfg -> ../boot/grub2/grub.cfg
*Detect which bootloader is installed
*Detect whether the system was booted using efi or the BIOS
e.g. in dmesg,
DMI: Apple Inc. MacPro3,1/Mac-F42C88C8, BIOS MP31.88Z.006C.B05.0802291410 02/29/08
I'm not entirely sure about the last one, since I've never booted the system in EFI mode. In previous fedoras it was very difficult to get a fully functioning system to boot using EFI, so many people are probably using rEFIt BIOS emulation.
Also note, that this does not occur when /boot/grub2-efi does not exist. So another workaround is to just uninstall the grub2-efi package.
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