Discovered my problem while searching launchpad for similar bugs. Found some information here: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/190147
Somehow the devicemap was incorrectly generated. running 'sudo grub-mkdevicemap' and then 'sudo update-grub' fixed my problems. Here's a properly generated entry now: ### BEGIN /etc/grub.d/10_linux ### menuentry "Ubuntu, Linux 2.6.31-10-server" { set quiet=1 insmod lvm insmod ext2 set root=(BigBlock-KarmicRoot) search --no-floppy --fs-uuid --set 8679421a-df8d-4e61-a88d-e0cae0d9a202 linux /boot/vmlinuz-2.6.31-10-server root=/dev/mapper/BigBlock-Karmic$ initrd /boot/initrd.img-2.6.31-10-server } -- grub-setup crashed with SIGSEGV in __libc_start_main() https://bugs.launchpad.net/bugs/386802 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs