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Newer Dell Systems Unable to Boot to Internal Boot Device in Legacy Boot Mode

Summary: This article provides more information about newer Dell computers. Latitude XX90 series laptop, that is unable to boot to internal boot devices when in Legacy boot mode.

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Article Content


Symptoms

Newer Dell computers, such as the Latitude XX90 series laptops are unable to boot to internal boot devices when in Legacy boot mode.

Cause

Legacy Boot mode and internal boot devices

With the Boot option set to Legacy boot mode on newer series of Dell computers, you will be unable to boot to internal boot devices (including hard drive, SSD, or eMMC storage devices). This issue may also occur after installing the operating system in Legacy Boot mode. A message to this effect appears in the system BIOS under the General > Boot Sequence settings (Figure 1):

Boot sequence settings
Figure 1: Boot Sequence settings

Resolution

Use UEFI instead of Legacy boot mode on newer series Dell computers to boot to internal boot device.

If the highlighted message in Figure 1 is missing from the Boot Sequence page. Update the BIOS to the latest available version at Dell Support Site.
If the Legacy External Devices setting is missing from the Boot Sequence settings. Update the BIOS.
Select BIOS under the drop-down Category menu and download and install the latest available BIOS update. The Dell computer must be imaged in UEFI mode unless booting to an external boot device.

Note: Some newer computers will only support "UEFI." It will not include an option for Legacy at all even with the latest BIOS version installed. This is normal, and it is working as expected.

UEFI mode
Figure 2: Boot Sequence settings (Only Support UEFI)

Note: UEFI mode requires a 64-bit operating system be installed (ex, Windows 10 Pro 64-bit, Windows 10 Home 64-bit, Ubuntu 16.04 SP1 LTS 64-bit).

Article Properties


Affected Product

Latitude, Vostro, XPS, Fixed Workstations, Latitude 5290 2-in-1, Latitude 5290, Latitude 7290, Latitude 3390 2-in-1, Latitude 7390 2-in-1, Latitude 7390, Latitude 3490, Latitude 5490, Latitude 7490, Latitude 3590, Latitude 5590

Last Published Date

17 Jun 2021

Version

6

Article Type

Solution