Arch Linux

renafoxx

Member

Registered: 2021-05-29

Posts: 1

Suddenly "no bootable device found", GRUB is not detected anymore

I have been using linux on my dual booted system along with windows for more than a year now. My windows is installed in UEFI mode and Linux is installed in Legacy mode. All was working fine and suddenly it stopped working so fine. I can't recall making any significant changes to my system last time I used linux. The important point to note here is that I can still just switch to UEFI and use windows.

Here is the /etc/fstab

# Static information about the filesystems.
# See fstab(5) for details.

# <file system> <dir> <type> <options> <dump> <pass>
# /dev/sda4
UUID=50e4da06-d1b9-421a-9507-a1628497ece1	/         	ext4      	rw,relatime	0 1

And here is grub.cfg

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
insmod part_gpt
insmod part_msdos
if [ -s $prefix/grubenv ]; then
  load_env
fi
if [ "${next_entry}" ] ; then
   set default="${next_entry}"
   set next_entry=
   save_env next_entry
   set boot_once=true
else
   set default="0"
fi

if [ x"${feature_menuentry_id}" = xy ]; then
  menuentry_id_option="--id"
else
  menuentry_id_option=""
fi

export menuentry_id_option

if [ "${prev_saved_entry}" ]; then
  set saved_entry="${prev_saved_entry}"
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z "${boot_once}" ]; then
    saved_entry="${chosen}"
    save_env saved_entry
  fi
}

function load_video {
  if [ x$feature_all_video_module = xy ]; then
    insmod all_video
  else
    insmod efi_gop
    insmod efi_uga
    insmod ieee1275_fb
    insmod vbe
    insmod vga
    insmod video_bochs
    insmod video_cirrus
  fi
}

if [ x$feature_default_font_path = xy ] ; then
   font=unicode
else
insmod part_gpt
insmod ext2
set root='hd0,gpt4'
if [ x$feature_platform_search_hint = xy ]; then
  search --no-floppy --fs-uuid --set=root --hint-ieee1275='ieee1275//disk@0,gpt4' --hint-bios=hd0,gpt4 --hint-efi=hd0,gpt4 --hint-baremetal=ahci0,gpt4  50e4da06-d1b9-421a-9507-a1628497ece1
else
  search --no-floppy --fs-uuid --set=root 50e4da06-d1b9-421a-9507-a1628497ece1
fi
    font="/usr/share/grub/unicode.pf2"
fi

if loadfont $font ; then
  set gfxmode=auto
  load_video
  insmod gfxterm
  set locale_dir=$prefix/locale
  set lang=en_US
  insmod gettext
fi
terminal_input console
terminal_output gfxterm
if [ x$feature_timeout_style = xy ] ; then
  set timeout_style=menu
  set timeout=5
# Fallback normal timeout code in case the timeout_style feature is
# unavailable.
else
  set timeout=5
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/10_linux ###
menuentry 'Arch Linux' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-50e4da06-d1b9-421a-9507-a1628497ece1' {
	load_video
	set gfxpayload=keep
	insmod gzio
	insmod part_gpt
	insmod ext2
	set root='hd0,gpt4'
	if [ x$feature_platform_search_hint = xy ]; then
	  search --no-floppy --fs-uuid --set=root --hint-ieee1275='ieee1275//disk@0,gpt4' --hint-bios=hd0,gpt4 --hint-efi=hd0,gpt4 --hint-baremetal=ahci0,gpt4  50e4da06-d1b9-421a-9507-a1628497ece1
	else
	  search --no-floppy --fs-uuid --set=root 50e4da06-d1b9-421a-9507-a1628497ece1
	fi
	echo	'Loading Linux linux ...'
	linux	/boot/vmlinuz-linux root=UUID=50e4da06-d1b9-421a-9507-a1628497ece1 rw  loglevel=3 quiet
	echo	'Loading initial ramdisk ...'
	initrd	/boot/initramfs-linux.img
}
submenu 'Advanced options for Arch Linux' $menuentry_id_option 'gnulinux-advanced-50e4da06-d1b9-421a-9507-a1628497ece1' {
	menuentry 'Arch Linux, with Linux linux' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-advanced-50e4da06-d1b9-421a-9507-a1628497ece1' {
		load_video
		set gfxpayload=keep
		insmod gzio
		insmod part_gpt
		insmod ext2
		set root='hd0,gpt4'
		if [ x$feature_platform_search_hint = xy ]; then
		  search --no-floppy --fs-uuid --set=root --hint-ieee1275='ieee1275//disk@0,gpt4' --hint-bios=hd0,gpt4 --hint-efi=hd0,gpt4 --hint-baremetal=ahci0,gpt4  50e4da06-d1b9-421a-9507-a1628497ece1
		else
		  search --no-floppy --fs-uuid --set=root 50e4da06-d1b9-421a-9507-a1628497ece1
		fi
		echo	'Loading Linux linux ...'
		linux	/boot/vmlinuz-linux root=UUID=50e4da06-d1b9-421a-9507-a1628497ece1 rw  loglevel=3 quiet
		echo	'Loading initial ramdisk ...'
		initrd	/boot/initramfs-linux.img
	}
	menuentry 'Arch Linux, with Linux linux (fallback initramfs)' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-fallback-50e4da06-d1b9-421a-9507-a1628497ece1' {
		load_video
		set gfxpayload=keep
		insmod gzio
		insmod part_gpt
		insmod ext2
		set root='hd0,gpt4'
		if [ x$feature_platform_search_hint = xy ]; then
		  search --no-floppy --fs-uuid --set=root --hint-ieee1275='ieee1275//disk@0,gpt4' --hint-bios=hd0,gpt4 --hint-efi=hd0,gpt4 --hint-baremetal=ahci0,gpt4  50e4da06-d1b9-421a-9507-a1628497ece1
		else
		  search --no-floppy --fs-uuid --set=root 50e4da06-d1b9-421a-9507-a1628497ece1
		fi
		echo	'Loading Linux linux ...'
		linux	/boot/vmlinuz-linux root=UUID=50e4da06-d1b9-421a-9507-a1628497ece1 rw  loglevel=3 quiet
		echo	'Loading initial ramdisk ...'
		initrd	/boot/initramfs-linux-fallback.img
	}
}

### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f  ${config_directory}/custom.cfg ]; then
  source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f  $prefix/custom.cfg ]; then
  source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###

Any idea what might have caused it all of a sudden and what might solve it?

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 77,483

Re: Suddenly "no bootable device found", GRUB is not detected anymore

Something™ (windows?) nuked the MBR?

My windows is installed in UEFI mode and Linux is installed in Legacy mode.

I'd start by "why" and end with "just don't" - just install grub into the ESP, https://wiki.archlinux.org/title/GRUB#UEFI_systems

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