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I have a problem with my Laptop (ThinkPad E540) and I can't boot correctly. I searched errors might be useful for my case but still can't figure what should I do. My guess is that problem comes from boot mode and I followed This but at the end it didn't help. after boot repair there's this message:

     Please do not forget to make your UEFI firmware boot on the Ubuntu 20.04.2 
LTS entry (sdb4/EFI/ubuntu/shimx64.efi file) !

but I don't know how to do that.

Also please tell me how to fix my problem. P.S This is my boot repair summary

Mehdi Shakibaii
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  • Please include text as part of the question not as a screen shot – David Feb 20 '21 at 14:50
  • If you have Secure Boot off, the ubuntu entry you have using grubx64.efi should work. Surprised it does not also have a second ubuntu entry that is shimx64.efi. See lines 30 that says ubuntu entry is UEFI default & details of Ubuntu entry on line 51. You can see those same details with 'sudo efibootmgr -v This says something was not correctly updated: "Warning: NVram was not modified." Do you have a UEFI setting that locks NVRAM? Possibly similar? Lenovo T460S unable to update firmware fwupdate disabled boot order lock https://ubuntuforums.org/showthread.php?t=2455027 – oldfred Feb 20 '21 at 15:37

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Try this link on adding menu item to the EFI bootloader.

https://www.linuxbabe.com/command-line/how-to-use-linux-efibootmgr-examples