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dual-boot
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URL:
https://askubuntu.com/q/1022700
Title:
Boot-Repair created too many grub menu entries for Windows
ID:
/2018/04/06/Boot-Repair-created-too-many-grub-menu-entries-for-Windows
Created:
April 6, 2018
Edited: June 12, 2020
Upload:
September 15, 2024
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Every time I’ve run boot-repair it adds a 5 extra Windows boot options to my main grub menu that do not work. In your case it has added 11 extra entries!
grub.cfg shows the problem
The secret can be found within /etc/grub/grub.cfg file:
### BEGIN /etc/grub.d/25_custom ###
menuentry "Windows UEFI bootmgfw.efi" {
search --fs-uuid --no-floppy --set=root D656-F2A8
chainloader (${root})/EFI/Microsoft/Boot/bootmgfw.efi
}
menuentry "Windows Boot UEFI loader" {
search --fs-uuid --no-floppy --set=root D656-F2A8
chainloader (${root})/EFI/Boot/bkpbootx64.efi
}
menuentry "EFI/ubuntu/fwupx64.efi" {
search --fs-uuid --no-floppy --set=root D656-F2A8
chainloader (${root})/EFI/ubuntu/fwupx64.efi
}
menuentry "Windows UEFI bootmgfw.efi sda1" {
search --fs-uuid --no-floppy --set=root 9478-B6E2
chainloader (${root})/EFI/Microsoft/Boot/bootmgfw.efi
}
menuentry "Windows Boot UEFI loader sda1" {
search --fs-uuid --no-floppy --set=root 9478-B6E2
chainloader (${root})/EFI/Boot/bkpbootx64.efi
### END /etc/grub.d/25_custom ###
### BEGIN /etc/grub.d/30_os-prober ###
menuentry 'Windows Boot Manager (on /dev/nvme0n1p2)' --class windows --class os $menuentry_id_option 'osprober-efi-D656-F2A8' {
savedefault
insmod part_gpt
insmod fat
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root D656-F2A8
else
search --no-floppy --fs-uuid --set=root D656-F2A8
fi
chainloader /EFI/Microsoft/Boot/bootmgfw.efi
}
menuentry 'Windows Boot Manager (on /dev/sda1)' --class windows --class os $menuentry_id_option 'osprober-efi-9478-B6E2' {
savedefault
insmod part_gpt
insmod fat
set root='hd0,gpt1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt1 --hint-efi=hd0,gpt1 --hint-baremetal=ahci0,gpt1 9478-B6E2
else
search --no-floppy --fs-uuid --set=root 9478-B6E2
fi
chainloader /efi/Microsoft/Boot/bootmgfw.efi
}
### END /etc/grub.d/30_os-prober ###
The section 30_os-prober contains the “good” Windows grub menu entries you want to keep. Section 25_custom contains the bogus entries created by boot-repair. You can’t edit the grub configuration file because it will simply be overwritten the next time update-grub is run.
Section 25_custom was created by Boot Repair
On my system:
$ locate 25_custom
/boot/efi/boot-repair/log/20171111_224241/nvme0n1p5/25_custom
/boot/efi/boot-repair/log/20171208_030854/nvme0n1p5/25_custom
/etc/grub.d/25_custom
Take a look at the extra Windows options that were setup (and don’t work):
$ cat /boot/efi/boot-repair/log/20171208_030854/nvme0n1p5/25_custom
#!/bin/sh
exec tail -n +3 $0
menuentry "Windows UEFI bootmgfw.efi" {
search --fs-uuid --no-floppy --set=root D656-F2A8
chainloader (${root})/EFI/Microsoft/Boot/bootmgfw.efi
}
menuentry "Windows Boot UEFI loader" {
search --fs-uuid --no-floppy --set=root D656-F2A8
chainloader (${root})/EFI/Boot/bkpbootx64.efi
}
menuentry "EFI/ubuntu/fwupx64.efi" {
search --fs-uuid --no-floppy --set=root D656-F2A8
chainloader (${root})/EFI/ubuntu/fwupx64.efi
}
menuentry "Windows UEFI bootmgfw.efi sda1" {
search --fs-uuid --no-floppy --set=root 9478-B6E2
chainloader (${root})/EFI/Microsoft/Boot/bootmgfw.efi
}
menuentry "Windows Boot UEFI loader sda1" {
search --fs-uuid --no-floppy --set=root 9478-B6E2
chainloader (${root})/EFI/Boot/bkpbootx64.efi
These are the erroneous entries boot-repair created in /etc/grub.d/25_custom that were subsequently compiled into \boot\grub\grub.cfg.
Reverse Boot Repair’s change to 25_custom
Use sudo -H gedit /etc/grub.d/25_custom and delete everything except the first three lines:
#!/bin/sh
exec tail -n +3 $0
- The file now contains two lines with text and one blank line.
- Save the file.
- Run
sudo update-grub. - Reboot.
Now your menu is no longer bloated with five bogus Windows menu entries that don’t work.
Double-check there are three lines in 25_custom
Run this command and verify 25_custom has three lines:
$ wc /etc/grub.d/25_custom
3 6 30
# ^ ^ ^
# | | +--- Number of characters
# | +----------- Number of words
# +------------------- Number of lines
I added the # comments to decipher wc (word count) output.