After a recent build on a Dell Laptop to Fedora 20 I found the need to update the BIOS on the laptop. With Windows this is a simple solution of downloading and installing. With Linux it is a bit more to do.
First we must install firmware-addon-dell.
$ sudo yum -y install firmware-addon-dell
Next we need to get the SystemID for the system to be able to download the correct update.
$ sudo /usr/sbin/getSystemId
Download the latest BIOS “.HDR” file for this system. Go here: http://linux.dell.com/repo/firmware/bios-hdrs/. Scroll down the list to find a directory matching the System ID from the previous step. The directory will be named: system_bios_ven_0x1028_dev_SYSTEM_ID_version_BIOS_VERSION. Go into this directory and download the file, “bios.hdr”.
Load dell_rbu module.
$ sudo modprobe dell_rbu
Apply the BIOS update that you just downloaded.
$ sudo dellBiosUpdate -u -f ./bios.hdr
System should update and reboot.