I have two hard drives, with two corresponding Grubs. Cargo Stowage Plan Software. One is from Arch Linux, and the other is from Ubuntu. Using Arch's grub, I can boot into either distribution.

How to make Debian os-prober and update-grub find Arch Linux partition. The Arch Linux install. Ensure that the encrypted /boot is unlocked and mounted before performing an update. /etc/grub.d/40_custom menuentry 'Arch Linux.

However, using Ubuntu's grub, I can see both Arch and Ubuntu, but cannot boot into Arch. I get the error: Kernel offset End kernel panic. Not syncing: VFS. Unable to mount root fs on unknown-block. I compared grub.cfg for both distributions. In Ubuntu's grub, I can see an entry for Arch, with the following line. Initrd /boot/intel-ucode.img I changed it to follow Arch's grub.cfg: initrd /boot/intel-ucode.img /boot/initramfs-linux.img Now I can boot into Arch from Ubuntu's grub.

It appears that Ubuntu is not appending this required option by default. How can I make Ubuntu automatically create the correct entry? Edit I'm updating Arch's grub with grub-mkconfig -o /boot/grub/grub.cfg. In Ubuntu, I've tried both update-grub and the raw command above (which it is aliased to). Edit 2 The uncommented lines of /etc/default/grub GRUB_DEFAULT='saved' GRUB_SAVEDEFAULT='true' GRUB_HIDDEN_TIMEOUT_QUIET='true' GRUB_TIMEOUT='3' GRUB_DISTRIBUTOR='`lsb_release -i -s 2>/dev/null echo Debian`' GRUB_CMDLINE_LINUX_DEFAULT=' GRUB_CMDLINE_LINUX='. @Sparhawk OK, this will work for your configuration that you have.

It will only test for the Arch Linux, then create the line with the intel-ucode.img. This will only work if the image file is there. If not, when the host reboots, you will get that kernel panic as I have tested, but the boot line is correct.

I am trying to find out from Arch linux why they have that img file at all. It actually says that it is needed on Intel processors, but it did boot fine on my AMD. But anyway, this does work now. – May 28 '15 at 5:30.

44 packages found. Description 1.1.5-1 2 0.00 TrustedGRUB for Anti Evil Maid. 0.2-1 0 0.00 a bootable EFISTUB kernel image creator (for UEFI systems) r9387.6750c4e-1 1 0.00 TPM enabled GRUB2 Bootloader 3.0-1 3 0.00 Midna Grub-theme. 1.4.0-3 1 0.00 TPM enabled GRUB2 Bootloader 0.4.6a_20170306-1 7 0.00 A GRUB boot loader support menu on windows(fat,ntfs)/linux(ext2,3,4) orphan 1.6-1 11 0.00 Chakra Dharma GRUB theme. 0.97-25 84 0.01 A GNU multiboot boot loader 5.6-1 1 0.02 Script to add OpenBSD iso images to the grub2 boot menu orphan v1.7.r6.g4388c33-1-1 16 0.02 grub-btrfs, Include btrfs snapshots at boot options. (grub menu) 1.0-1 4 0.02 DeniX grub2 theme 2017.05-1 2 0.02 add the grml ISO image to the grub2 boot menu 1.0.0-5 9 0.02 multi boot compliant game for i386 and compatible x86_64 1.0-1 13 0.02 Slightly adapted GRUB2 gfxmenu theme from Chakra's Dharma theme.

Fits well to Caledonia art suite (same author). R21.b969dc5-1 16 0.02 A minimalistic GRUB theme inspired by Breeze orphan 1.1-1 1 0.04 stylishdark grub2 theme 1.0-2 1 0.06 Solarized-Dark-Materialized grub2 theme 8.7-1 2 0.09 BunsenLabs wallpaper collection 5.1.1-1 16 0.09 Installs a rescue system into the boot partition to allow grub to boot it.