Grub rescue “symbol not found: ‘grub_efi_secure_boot'â€, cannot fix 'unknown file system' error
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This is on a Lenovo Thinkpad 13. It dual-boots Windows 10 and Elementary OS with the grub boot manager. It's UEFI.
Upon booting, I received the "error: unknown filesystem" message
Commands:
grub rescue> set prefix=(hd0,5)/boot/grub/
grub rescue> insmod linux
error: symbol 'grub_efi_secure_boot' not found.
Alternatively, when I was trying a different approach:
grub rescue> set root=(hd0,5)
grub rescue> set prefix=(hd0,5)/boot/grub
grub rescue> insmod normal
grub rescue> normal
However, when selecting Elementary OS, I was met with:
error: symbol 'grub_efi_secure_boot' not found.
I'm pretty sure that (hd0,5) is the correct one, though, as it does not give the unknown file system error and the .mod files are there.
Additional/Full context, including potentially useful/crucial bits of info:
I had initially set up this laptop to dual boot Windows 10 and Arch Linux.
Due to some issues with grub not appearing, I had entered bcdedit /set bootmgr path EFIarchgrubx64.efi into the Windows administrative command prompt to make this work.
Eventually, I decided that Arch wasn't right for me and switched to Elementary OS.
I deleted the Arch partitions through Windows, and then installed Elementary OS. I then successfully booted into Elementary and installed some software.
Afterwards, I booted into Windows to do some minor things such as set wallpaper and the like.
After rebooting the computer, I was met with grub rescue, and the above situation has occurred.
Edit: Secure boot is disabled
dual-boot grub elementary-os
edited 4 mins ago
Rui F Ribeiro
37.3k1374118
asked Jul 4 '17 at 4:07
J. Del Val
63
add a comment |Â
up vote
1
down vote
favorite
This is on a Lenovo Thinkpad 13. It dual-boots Windows 10 and Elementary OS with the grub boot manager. It's UEFI.
Upon booting, I received the "error: unknown filesystem" message
Commands:
grub rescue> set prefix=(hd0,5)/boot/grub/
grub rescue> insmod linux
error: symbol 'grub_efi_secure_boot' not found.
Alternatively, when I was trying a different approach:
grub rescue> set root=(hd0,5)
grub rescue> set prefix=(hd0,5)/boot/grub
grub rescue> insmod normal
grub rescue> normal
However, when selecting Elementary OS, I was met with:
error: symbol 'grub_efi_secure_boot' not found.
I'm pretty sure that (hd0,5) is the correct one, though, as it does not give the unknown file system error and the .mod files are there.
Additional/Full context, including potentially useful/crucial bits of info:
I had initially set up this laptop to dual boot Windows 10 and Arch Linux.
Due to some issues with grub not appearing, I had entered bcdedit /set bootmgr path EFIarchgrubx64.efi into the Windows administrative command prompt to make this work.
Eventually, I decided that Arch wasn't right for me and switched to Elementary OS.
I deleted the Arch partitions through Windows, and then installed Elementary OS. I then successfully booted into Elementary and installed some software.
Afterwards, I booted into Windows to do some minor things such as set wallpaper and the like.
After rebooting the computer, I was met with grub rescue, and the above situation has occurred.
Edit: Secure boot is disabled
dual-boot grub elementary-os
edited 4 mins ago
Rui F Ribeiro
37.3k1374118
asked Jul 4 '17 at 4:07
J. Del Val
63
Is secure boot disabled?
– defalt
Jul 4 '17 at 8:10
Yeah, it's disabled
– J. Del Val
Jul 5 '17 at 5:28
add a comment |Â
up vote
1
down vote
favorite
up vote
1
down vote
favorite
This is on a Lenovo Thinkpad 13. It dual-boots Windows 10 and Elementary OS with the grub boot manager. It's UEFI.
Upon booting, I received the "error: unknown filesystem" message
Commands:
grub rescue> set prefix=(hd0,5)/boot/grub/
grub rescue> insmod linux
error: symbol 'grub_efi_secure_boot' not found.
Alternatively, when I was trying a different approach:
grub rescue> set root=(hd0,5)
grub rescue> set prefix=(hd0,5)/boot/grub
grub rescue> insmod normal
grub rescue> normal
However, when selecting Elementary OS, I was met with:
error: symbol 'grub_efi_secure_boot' not found.
I'm pretty sure that (hd0,5) is the correct one, though, as it does not give the unknown file system error and the .mod files are there.
Additional/Full context, including potentially useful/crucial bits of info:
I had initially set up this laptop to dual boot Windows 10 and Arch Linux.
Due to some issues with grub not appearing, I had entered bcdedit /set bootmgr path EFIarchgrubx64.efi into the Windows administrative command prompt to make this work.
Eventually, I decided that Arch wasn't right for me and switched to Elementary OS.
I deleted the Arch partitions through Windows, and then installed Elementary OS. I then successfully booted into Elementary and installed some software.
Afterwards, I booted into Windows to do some minor things such as set wallpaper and the like.
After rebooting the computer, I was met with grub rescue, and the above situation has occurred.
Edit: Secure boot is disabled
dual-boot grub elementary-os
edited 4 mins ago
Rui F Ribeiro
37.3k1374118
asked Jul 4 '17 at 4:07
J. Del Val
63
This is on a Lenovo Thinkpad 13. It dual-boots Windows 10 and Elementary OS with the grub boot manager. It's UEFI.
Upon booting, I received the "error: unknown filesystem" message
Commands:
grub rescue> set prefix=(hd0,5)/boot/grub/
grub rescue> insmod linux
error: symbol 'grub_efi_secure_boot' not found.
Alternatively, when I was trying a different approach:
grub rescue> set root=(hd0,5)
grub rescue> set prefix=(hd0,5)/boot/grub
grub rescue> insmod normal
grub rescue> normal
However, when selecting Elementary OS, I was met with:
error: symbol 'grub_efi_secure_boot' not found.
I'm pretty sure that (hd0,5) is the correct one, though, as it does not give the unknown file system error and the .mod files are there.
Additional/Full context, including potentially useful/crucial bits of info:
I had initially set up this laptop to dual boot Windows 10 and Arch Linux.
Due to some issues with grub not appearing, I had entered bcdedit /set bootmgr path EFIarchgrubx64.efi into the Windows administrative command prompt to make this work.
Eventually, I decided that Arch wasn't right for me and switched to Elementary OS.
I deleted the Arch partitions through Windows, and then installed Elementary OS. I then successfully booted into Elementary and installed some software.
Afterwards, I booted into Windows to do some minor things such as set wallpaper and the like.
After rebooting the computer, I was met with grub rescue, and the above situation has occurred.
Edit: Secure boot is disabled
dual-boot grub elementary-os
dual-boot grub elementary-os
edited 4 mins ago
Rui F Ribeiro
37.3k1374118
asked Jul 4 '17 at 4:07
J. Del Val
63
edited 4 mins ago
Rui F Ribeiro
37.3k1374118
asked Jul 4 '17 at 4:07
J. Del Val
63
edited 4 mins ago
Rui F Ribeiro
37.3k1374118
edited 4 mins ago
Rui F Ribeiro
37.3k1374118
edited 4 mins ago
Rui F Ribeiro
37.3k1374118
37.3k1374118
asked Jul 4 '17 at 4:07
J. Del Val
63
asked Jul 4 '17 at 4:07
J. Del Val
63
asked Jul 4 '17 at 4:07
J. Del Val
63
63
Is secure boot disabled?
– defalt
Jul 4 '17 at 8:10
Yeah, it's disabled
– J. Del Val
Jul 5 '17 at 5:28
add a comment |Â
Is secure boot disabled?
– defalt
Jul 4 '17 at 8:10
Yeah, it's disabled
– J. Del Val
Jul 5 '17 at 5:28
Is secure boot disabled?
– defalt
Jul 4 '17 at 8:10
Is secure boot disabled?
– defalt
Jul 4 '17 at 8:10
Yeah, it's disabled
– J. Del Val
Jul 5 '17 at 5:28
Yeah, it's disabled
– J. Del Val
Jul 5 '17 at 5:28
add a comment |Â
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Is secure boot disabled?
– defalt
Jul 4 '17 at 8:10
Yeah, it's disabled
– J. Del Val
Jul 5 '17 at 5:28