Skip to main content
Sign Out

Welcome to Dell

My Account
  • Place orders quickly and easily
  • View orders and track your shipping status
  • Enjoy members-only rewards and discounts
  • Create and access a list of your products
  • Manage your Dell EMC sites, products, and product-level contacts using Company Administration.
Sign In Create an Account Dell Financial Services Premier Sign In Partner Program Sign In
Contact Us

Your Dell.com Carts

BIOS Settings Prerequisites for Ubuntu 22.04 Full Disk Encryption Operating System Installation or Booting

Summary: Ubuntu 22.04 Full Disk Encryption (FDE) is a special version of Ubuntu that provides Trusted Platform Module (TPM) full disk encryption support on select Dell computers. With current computer designs, specific BIOS settings are required before performing a fresh Operating System (OS) installation or booting into the OS. ...

This article applies to   This article does not apply to 
Check out resources for

Instructions

Ubuntu Full Disk Encryption

To apply the required settings, boot into the BIOS setup by pressing F12 after powering on the computer. In the BIOS setup menu, perform the following steps:

  1. Turn "Secure Boot" "On":
    • On the left pane, click on "Boot Configuration."
    • Scroll the right pane and find the "Secure Boot - Enable Secure Boot" setting. Click the switch to "ON" (Figure 1).
      Dell OptiPlex BIOS, Boot Configuration Menu, Enable Secure Boot
      Figure 1
  2. Turn "Absolute" "Off":
    • On the left pane, click on "Security."
    • Scroll the right pane and find the "Absolute" settings. Check the radio button to "Disable Absolute" (Figure 2).
      Dell OptiPlex BIOS, Security Configuration Menu, Disable Absolute
      Figure 2
  3. Clear the "TPM":
    • On the left pane, click on "Security."
    • Scroll the right pane and find the "TPM 2.0 Security - Clear" setting and click the switch to ">ON" (Figure 3).
      Dell OptiPlex BIOS, Security Configuration Menu, Clear TPM 2.0 Security
      Figure 3

After applying the changes and rebooting the computer, you can continue with an OS installation or booting to the OS.

Note: Without the correct BIOS settings, you are blocked from booting into the OS desktop.

Back to Top

Affected Products

OptiPlex 3000 Thin Client
Article Properties
Article Number: 000213375
Article Type: How To
Last Modified: 21 Aug 2023
Version:  1
Find answers to your questions from other Dell users
Support Services
Check if your device is covered by Support Services.
Article Properties
Article Number: 000213375
Article Type: How To
Last Modified: 21 Aug 2023
Version:  1
Find answers to your questions from other Dell users
Support Services
Check if your device is covered by Support Services.