Because of a hardware failure my motherboard has just been replaced. After the replacement, my system (Ubuntu 17.10) doesn't boot:
ALERT! UUID=dd84f4b3-d5bf-42e4-9b5e-ec685a461fad does not exist. Dropping to a shell.
I've used a Live USB Ubuntu to debug this problem. Here are some results:
/etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/nvme0n1p3 during installation
UUID=dd84f4b3-d5bf-42e4-9b5e-ec685a461fad / ext4 errors=remount-ro 0 1
# /boot/efi was on /dev/nvme0n1p1 during installation
UUID=B38D-559B /boot/efi vfat umask=0077 0 1
# swap was on /dev/nvme0n1p4 during installation
UUID=f4134c38-10b9-478f-b550-54650a9f5140 none swap sw 0 0
blkid
/dev/nvme0n1p1: SEC_TYPE="msdos" UUID="B38D-559B" TYPE="vfat" PARTLABEL="EFI System Partition" PARTUUID="98be6c97-c354-49a6-a432-9201d56a421b"
/dev/nvme0n1p2: LABEL="OS" UUID="B39E-7035" TYPE="vfat" PARTLABEL="fat32" PARTUUID="d3006358-8d82-4e0b-99f8-87a5261cf7e8"
/dev/nvme0n1p3: LABEL="UBUNTU" UUID="dd84f4b3-d5bf-42e4-9b5e-ec685a461fad" TYPE="ext4" PARTUUID="24e5b96d-f20c-43dd-9e48-672760b0e6f7"
/dev/sda1: LABEL="UBUNTU 17_1" UUID="88D4-322D" TYPE="vfat" PARTUUID="3d0a270b-01"
fdisk -l
Disk /dev/loop0: 1.3 GiB, 1427259392 bytes, 2787616 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
Disk /dev/nvme0n1: 477 GiB, 512110190592 bytes, 1000215216 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: 43E35EBE-2A73-404A-9D4A-851815F33F9A
Device Start End Sectors Size Type
/dev/nvme0n1p1 34 488281 488248 238.4M EFI System
/dev/nvme0n1p2 488282 5934980 5446699 2.6G Microsoft basic data
/dev/nvme0n1p3 5935104 933576703 927641600 442.3G Linux filesystem
/dev/nvme0n1p4 933576704 1000214527 66637824 31.8G Linux swap
Disk /dev/sda: 28.7 GiB, 30752636928 bytes, 60063744 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: 0x3d0a270b
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 60063743 60061696 28.7G c W95 FAT32 (LBA)
It looks like the UUID's in fstab
are correct, but I still get that error message.
How can I repair my Ubuntu installation?
I've tried the given solution in ALERT! /dev/disk/by-uuid/xxxxxxxxx does not exist. Dropping to a shell, but unfortunately that didn't help (I mounted /dev/nvme0n1p3
). Still the same problem.
Update: When I select UEFI boot mode in system setup, I still get this problem. But when I select legacy boot I got 'no boot device found'. But here comes the tricky part: when I select legacy mode and use F12 to select UEFI/Ubuntu, it starts without a problem.