Article Number: 000125414
Newer Dell computers, such as the Latitude XX90 series laptops are unable to boot to internal boot devices when in Legacy boot mode.
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):
Figure 1: Boot Sequence settings
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.
Figure 2: Boot Sequence settings (Only Support UEFI)
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
17 Jun 2021