Why is my machine booting to EFI Shell prompt?

2 min. readlast update: 11.25.2025

If your laptop starts directly into the EFI Shell, this usually means the boot loader is no longer working properly. Don’t worry — this can often be fixed by manually booting and updating the boot configuration.


Step 1: Attempt to Manually Boot via EFI Shell

At the EFI Shell prompt, type the following commands one by one, pressing Enter after each:

map -r
fs0:
cd EFI
cd ubuntu
grubx64.efi

If successful, your system should boot into Ubuntu.


Step 2: Update the Boot Loader

Once you’ve booted into Ubuntu, open the Terminal (Ctrl + Alt + T) and run:

sudo update-grub

Then reboot your laptop to see if this resolves the issue.


Step 3: Boot from a USB Drive (if the above fails)

If the EFI Shell method doesn’t work, try booting from a bootable USB drive.
If you don’t already have one, you can easily create it using a blank USB stick — see our guide here:
👉 Recovery from a Bootable USB Drive

Once you’ve booted into the Ubuntu Live environment, open a Terminal (Ctrl + Alt + T) and check if your SSD is detected:

For SATA SSDs:

sudo fdisk -l | grep sda

If no drive appears, it may not be seated correctly — continue to the next step.

For NVMe SSDs:

sudo fdisk -l | grep nvme


Step 4: Check the SSD Connection

If your SSD isn’t detected, you’ll need to physically check it.
Please refer to the disassembly guide for your specific model in our Help Centre before proceeding.
These guides include detailed steps and images to help you safely access and reseat your SSD.


Step 5: Need Help?

If you’ve tried all the above steps and are still experiencing issues, please contact our support team — we’re happy to help:

📧 support@starlabs.systems

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