Grub rescue “symbol not found: ‘grub_efi_secure_boot'”, 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







share|improve this question























  • Is secure boot disabled?
    – defalt
    Jul 4 '17 at 8:10










  • Yeah, it's disabled
    – J. Del Val
    Jul 5 '17 at 5:28














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







share|improve this question























  • Is secure boot disabled?
    – defalt
    Jul 4 '17 at 8:10










  • Yeah, it's disabled
    – J. Del Val
    Jul 5 '17 at 5:28












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







share|improve this question















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






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited 4 mins ago









Rui F Ribeiro

37.3k1374118




37.3k1374118










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
















  • 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















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