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How To Fix “VMX (outside TXT) Disabled by BIOS” Error on Ubuntu 20.10

Ubuntu 20

If you’re an Ubuntu 20.10 user, you might have encountered the error message “VMX (outside TXT) disabled by BIOS”. This typically indicates that the Virtualization Technology (VT), also known as VMX, is disabled in your computer’s BIOS settings. VT is essential for running virtual machines and certain software. In this article, we’ll guide you through the steps to enable VMX and resolve this error.

Quick Answer

To fix the "VMX (outside TXT) disabled by BIOS" error on Ubuntu 20.10, you need to access your computer’s BIOS settings and enable the Virtualization Technology option. This can typically be done by navigating to the CPU or Processor settings in the BIOS and changing the Virtualization Technology setting to "Enabled." Save the changes and exit the BIOS.

Understanding the Error

The VMX (Virtual Machine Extensions) are designed to improve the performance of your virtual machines. When disabled, you may encounter the “VMX (outside TXT) disabled by BIOS” error. This error means that your system’s BIOS settings have disabled the VMX, preventing your system from utilizing virtualization technology.

Accessing BIOS Settings

To fix this error, you need to access your computer’s BIOS settings. The method to access BIOS varies depending on your system’s manufacturer. Commonly used keys to enter the BIOS setup are F2, F10, or Del. If these don’t work, refer to your computer’s manual or manufacturer’s website for specific instructions.

Restart your computer and press the appropriate key to enter BIOS.

Enabling Virtualization Technology

Once you’re in the BIOS settings, follow these steps:

  1. Navigate to the CPU or Processor settings: The exact location and naming may differ depending on your BIOS version. Look for sections related to your processor.
  2. Find the Virtualization Technology option: This option may be labeled as “Virtualization Technology,” “Intel Virtualization Technology,” or “AMD-V,” depending on your processor.
  3. Enable the Virtualization Technology option: Select the option and change the setting to “Enabled.”
  4. Save changes and exit BIOS: This is typically done by pressing F10, but check your BIOS instructions to be sure.

After these steps, the error message should no longer appear when booting into Ubuntu 20.10.

Final Thoughts

Enabling a processor feature that you don’t use solely to remove an error message may not be necessary. However, if you do require virtualization technology for running virtual machines or certain software, enabling it is essential.

If you encounter any difficulties or if the issue persists, refer to your manufacturer’s detailed instructions and troubleshooting steps. Additionally, there are ongoing discussions and bug reports related to this issue on various forums, which can provide further insights.

Remember, modifying BIOS settings should be done with caution. Incorrect settings can cause system instability or boot failures. Always ensure you understand the changes you’re making.

In summary, the “VMX (outside TXT) disabled by bios” error message can be resolved by enabling the Virtualization Technology in your computer’s BIOS settings. This will allow your Ubuntu 20.10 system to utilize virtualization technology, improving the performance of your virtual machines.

What is BIOS?

BIOS stands for Basic Input/Output System. It is firmware that is built into your computer’s motherboard and is responsible for initializing the hardware components of your system during startup.

Why is virtualization technology important?

Virtualization technology allows you to run multiple operating systems or software environments on a single physical machine. It is commonly used for running virtual machines, which can be useful for testing software, running different operating systems, or creating isolated environments for specific tasks.

How can I determine if virtualization technology is enabled on my system?

To check if virtualization technology is enabled on your system, you can use the lscpu command in the terminal. Look for the "Virtualization" field in the output. If it says "VT-x" or "AMD-V", it means virtualization technology is enabled.

Will enabling virtualization technology have any impact on my system’s performance?

Enabling virtualization technology itself does not have a significant impact on your system’s performance. However, running virtual machines or software that utilizes virtualization may require additional system resources, which can affect overall performance.

Can I enable virtualization technology on any computer?

Not all computers support virtualization technology. It depends on your processor and motherboard. You need a processor that supports virtualization technology, such as Intel’s VT-x or AMD’s AMD-V. Additionally, your motherboard’s BIOS must have the option to enable virtualization technology.

Are there any risks associated with modifying BIOS settings?

Modifying BIOS settings should be done with caution. Incorrect settings can cause system instability or boot failures. It is recommended to have a good understanding of the changes you’re making and follow the manufacturer’s instructions carefully.

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