audiodef
Watchman
Joined: 06 Jul 2005
Posts: 6639
Location: The soundosphere
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 Posted: Wed Dec 09, 2015 9:02 pm Post subject: Gentoo dual-boot w/ Gentoo, vmlinuz not found [SOLVED] |
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I'm trying to set up a dual boot of Gentoo with Gentoo. The reason for this is I've moved my development of Gentoo Studio from swapping out a physical drive in a laptop to using a hard drive in my actually computer DAW. I've tested the second Gentoo installation by switching the boot disk in the BIOS, and it works. What doesn't work is grub2 on my primary drive actually booting the second install. grub2-mkconfig finds it, but apparently does not assign it the correct params to get it booted, so it ends with a cannot find vmlinuz error.
I'm having trouble figuring out exactly how I need to tweak grub.cfg. Here's the entry for the second Gentoo installation:
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menuentry 'Gentoo Base System release 2.2 (on /dev/sdd4)' --class gnu-linux --class gnu --class os $menuentry_id_option
'osprober-gnulinux-simple-d097f211-ec2b-40e0-a60f-e44c4d9b7111' {
insmod part_gpt
insmod ext2
set root='hd3,gpt4'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd3,gpt4 --hint-efi=hd3,gpt4 --hint-baremetal=ahci3,gpt4
d097f211-ec2b-40e0-a60f-e44c4d9b7111
else
search --no-floppy --fs-uuid --set=root d097f211-ec2b-40e0-a60f-e44c4d9b7111
fi
linux /boot/vmlinuz-4.1.5-rt-rt5 root=/dev/sdd4
}
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(Copied from nano -$ to avoid line wrap.)
Here's my fdisk -l. The disk for the second Gentoo install is sdd.
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Disk /dev/sdb: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x000225f0
Device Boot Start End Sectors Size Id Type
/dev/sdb1 2048 1953525167 1953523120 931.5G 83 Linux
Disk /dev/sdc: 74.5 GiB, 80026361856 bytes, 156301488 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: D52B1AFB-E087-44DE-8645-5C6FD438D3E0
Device Start End Sectors Size Type
/dev/sdc1 2048 6143 4096 2M BIOS boot
/dev/sdc2 6144 268287 262144 128M Linux swap
/dev/sdc3 268288 1316863 1048576 512M Microsoft basic data
/dev/sdc4 1316864 156299439 154982576 73.9G Microsoft basic data
Disk /dev/sdd: 465.8 GiB, 500107862016 bytes, 976773168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: CF8F07C9-5079-42E4-8953-5FB575B0DC11
Device Start End Sectors Size Type
/dev/sdd1 2048 6143 4096 2M BIOS boot
/dev/sdd2 6144 268287 262144 128M EFI System
/dev/sdd3 268288 1316863 1048576 512M Linux filesystem
/dev/sdd4 1316864 121563135 120246272 57.3G Linux filesystem
/dev/sdd5 121563136 976773119 855209984 407.8G Microsoft basic data
Disk /dev/sda: 465.8 GiB, 500107862016 bytes, 976773168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x3c6430ed
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 206847 204800 100M 7 HPFS/NTFS/exFAT
/dev/sda2 206848 976771071 976564224 465.7G 7 HPFS/NTFS/exFAT
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How should I figure out how to fix the grub.cfg entry?
EDIT:
Figured it out. grub2-mkconfig assigned the wrong uuid, so I did
| Code: |
cd /dev/disk/by-uuid
ls -lah
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That showed me which partition had which uuid. The uuid needed to boot the second Gentoo install was incorrect in grub.cfg. Manually changing that to the correct one and removing "/boot" from the vmlinuz line did the trick.
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Installing Gentoo
