In the world of single board computers and Ubuntu installations, you may occasionally encounter an issue where, instead of booting into Ubuntu, your computer displays a device mapping table on the EFI shell. This problem can arise due to a variety of reasons, such as issues with the bootloader or incorrect partition settings. This article aims to provide you with detailed solutions to address this issue.
Temporary Workaround: Manual GRUB Launch
A temporary workaround to this problem is to manually launch GRUB from the EFI shell, which should then boot into Ubuntu. Here’s how you can do it:
- Access the EFI shell. You should be presented with a
Shell>prompt. - Type
fs0:and press Enter. This command changes the current file system tofs0, which is typically the EFI System Partition. - Type
cd EFI\ubuntuand press Enter. This command changes the current directory to the Ubuntu directory in the EFI partition. - Type
shimx64.efiand press Enter. This command launches theshimx64.efifile, which is a part of the Secure Boot process and is responsible for launching GRUB.
This sequence should launch GRUB, which will then boot into Ubuntu.
Boot Repair Utility: A Comprehensive Tool
Another option to fix this issue is to use the Boot Repair utility. This utility is designed to help fix boot issues in Ubuntu. Here’s how you can use it:
- Boot into Ubuntu using the temporary workaround mentioned above.
- Install the Boot Repair utility by typing
sudo apt-get install -y boot-repair && boot-repairin the terminal and pressing Enter. This command installs the utility and then runs it. - In the Boot Repair utility, select the “Create BootInfo Summary” option. This option generates a report about your boot configuration.
- When prompted, choose to upload the report. The utility will provide a URL, post this URL.
This URL will provide more details about your configuration, which can help in finding a more permanent solution.
Permanent Solution: File Copying
In some cases, you may find a solution that involves copying a file to make the fix permanent. This solution may require further explanation, as it might not be clear how it works. You can refer to this link for more information on this workaround.
Hardware Issues
It’s worth noting that if you suspect hardware issues, such as a faulty motherboard, it could also cause the system to reset and prevent proper booting. In such cases, you may need to investigate and potentially replace the hardware.
Conclusion
In conclusion, the issue of the EFI Shell device mapping table appearing after Ubuntu installation can be resolved using various methods, such as manually launching GRUB, using the Boot Repair utility, or copying specific files. Always remember to carefully follow the instructions provided and seek further assistance if needed. With patience and a bit of troubleshooting, you should be able to resolve this issue and enjoy your Ubuntu experience.
EFI Shell is a command-line interface provided by the Extensible Firmware Interface (EFI) system. It allows users to access and manage the EFI system partition, which contains essential files for booting the operating system.
There can be various reasons for encountering the EFI Shell device mapping table after Ubuntu installation. It could be due to issues with the bootloader, incorrect partition settings, or even hardware problems.
The Boot Repair utility is a tool designed to help fix boot issues in Ubuntu. It can automatically detect and repair common boot problems, including those related to the EFI Shell device mapping table.
Yes, in some cases, a permanent solution may involve copying specific files. However, the process can vary depending on the specific situation. It’s recommended to refer to the provided link or seek further assistance for a detailed explanation.
If you suspect hardware issues, such as a faulty motherboard, it is advisable to investigate further and potentially replace the hardware. Hardware problems can interfere with the proper booting process and may require professional assistance.
If none of the solutions mentioned in this article work, it’s recommended to seek help from the Ubuntu community or consult with a technical expert who can provide personalized assistance based on your specific situation.
