Updating The Dell Bios In Linux And Ubuntu Environments; Flashing The Bios From The F12 One-Time Boot Menu - Dell P121G Service Manual

4. Restart the system and press F12 when the Dell Splash logo appears to display the One Time Boot Menu.
5. Using arrow keys, select USB Storage Device and click Return.
6. The system will boot to a Diag C:\> prompt.
7. Run the file by typing the full filename e.g. O9010A12.exe and press Return.
8. The BIOS Update Utility will load, follow the instructions on screen.
Figure 1. DOS BIOS Update Screen
Updating the Dell BIOS in Linux and Ubuntu
environments
If you want to update the system BIOS in a Linux environment such as Ubuntu, see https://www.dell.com/support/article/
sln171755/.

Flashing the BIOS from the F12 One-Time boot menu

Updating your system BIOS using a BIOS update.exe file copied to a FAT32 USB key and booting from the F12 one time boot
menu.
About this task
BIOS Update
You can run the BIOS update file from Windows using a bootable USB key or you can also update the BIOS from the F12
One-Time boot menu on the system.
Most Dell systems built after 2012 have this capability and you can confirm by booting your system to the F12 One-Time Boot
Menu to see if BIOS FLASH UPDATE is listed as a boot option for your system. If the option is listed, then the BIOS supports
this BIOS update option.
NOTE: Only systems with BIOS Flash Update option in the F12 One-Time Boot Menu can use this function.
Updating from the One-Time Boot Menu
To update your BIOS from the F12 One-Time boot menu, you will need:
● USB key formatted to the FAT32 file system (key does not have to be bootable)
● BIOS executable file that you downloaded from the Dell Support website and copied to the root of the USB key
● AC power adapter connected to the system
System setup 65