I have an HP Pavillion Touch 14-N009LA laptop running on an AMD A8-4555M CPU, 8 GB of RAM, and a 750 GB HD, currently running on dual boot Windows 8.1 accessible via the system's EFI boot manager, and Debian Jessie accessible via a special option on my startup menu to start an OS installed under legacy BIOS mode. I am trying to install Gentoo on a dm-crypt partition and I have already set up an encrypted partition for the system's root, and a plaintext partition for the Gentoo kernel, initramfs and GRUB configuration. I have already installed the stage 3 files, Portage, compiled the kernel and generated a LUKS-capable initramfs using genkernel --luks all.
After unsuccessfully getting the system to boot from Gentoo's GRUB2, I figured I could also boot Gentoo by adding an entry to Debian's GRUB configuration, so I edited /etc/grub.d/40_custom with the following:
menuentry "Gentoo Linux" {
set root=(hd0,9)
linux /kernel-genkernel-x86_64-3.12.21-gentoo-r1 cryptdevice=/dev/sda11:dm-root root=/dev/mapper/dm-root
initrd /initramfs-genkernel-x86_64-3.12.21-gentoo-r1
}
After running update-grub2 the entry shows up just fine on the GRUB configuration. However, when I try to boot said entry, GRUB claims that it can't find the specified kernel image, even though I'm absolutely sure I'm specifying it fine.
More details about my system's configuration:
Output of lsblk:
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 698.7G 0 disk
├─sda1 8:1 0 400M 0 part
├─sda2 8:2 0 260M 0 part /boot/efi
├─sda3 8:3 0 128M 0 part
├─sda4 8:4 0 183.1G 0 part /media/C <Windows 8.1>
├─sda5 8:5 0 350M 0 part
├─sda6 8:6 0 25.2G 0 part
├─sda7 8:7 0 1.6G 0 part /boot <Debian boot>
├─sda8 8:8 0 8.2G 0 part [SWAP]
├─sda9 8:9 0 40G 0 part / <Debian system root>
├─sda10 8:10 0 4.4G 0 part <Gentoo boot>
├─sda11 8:11 0 426.4G 0 part <Gentoo encrypted system root>
└─sda12 8:12 0 8.7G 0 part
sr0 11:0 1 1024M 0 rom
Output of parted -l:
Model: ATA WDC WD7500BPVX-6 (scsi)
Disk /dev/sda: 750GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Number Start End Size File system Name Flags
1 1049kB 420MB 419MB ntfs Basic data partition hidden, diag
2 420MB 693MB 273MB fat32 EFI system partition boot
3 693MB 827MB 134MB Microsoft reserved partition msftres
4 827MB 197GB 197GB ntfs Basic data partition msftdata
10 197GB 202GB 4719MB ext2 msftdata
11 202GB 660GB 458GB msftdata
12 660GB 669GB 9343MB linux-swap(v1)
7 669GB 671GB 1709MB ext2 msftdata
8 671GB 680GB 8791MB linux-swap(v1)
9 680GB 723GB 42.9GB ext4 msftdata
5 723GB 723GB 367MB ntfs hidden, diag
6 723GB 750GB 27.1GB ntfs Basic data partition hidden, msftdata
Contents of /dev/sda10, my Gentoo boot partition:
total 9436
drwxr-xr-x 4 root root 4096 Jul 1 2014 grub
-rw-r--r-- 1 root root 3916272 Jul 1 2014 initramfs-genkernel-x86_64-3.12.21-gentoo-r1
-rw-r--r-- 1 root root 3603216 Jul 1 17:16 kernel-genkernel-x86_64-3.12.21-gentoo-r1
drwx------ 2 root root 16384 Jun 30 17:09 lost+found
-rw-r--r-- 1 root root 2103510 Jul 1 17:16 System.map-genkernel-x86_64-3.12.21-gentoo-r1
Best Answer
I don't remember if EFI GRUB2 uses
LoadImage()(most likely it does by now as the RestrictedBoot story has basically boiled down to "your last-mile bootloader has to orshimwill blow it up") -- it will take EFI drivers (like those available with refind) if that's the case; GRUB-specific filesystem drivers are not available to EFI firmware.Your kernel/initrd partition is not FAT32 so it's not accessible without those drivers. So try with
sda2first. See also the excellent Rod Smith's series.