In this post, I recorded my ThinkPad x220 BIOS update steps. In Windows, we can use BIOS Update Utility provided by Lenovo, but it's only available in Windows platformas. For Ubuntu user like me, we can still update BIOS with a USB disk.

Download BIOS Update Bootable CD

The latest version is 1.39(2013/11), Go to lenovo support site:BIOS Update Bootable CD for Windows 8 (32-bit, 64-bit), 7 (32-bit, 64-bit), Vista (32-bit, 64-bit), XP - ThinkPad X220, X220i, X220 Tablet, X220i Tablet, download 8duj25us.iso(31.6 MB)

Download geteltorito.pl to generate boot image

$ wget 'http://www.uni-koblenz.de/~krienke/ftp/noarch/geteltorito/geteltorito.pl'

Generate bootable image from geteltorito.pl

$ perl geteltorito.pl 8duj10uc.iso > biosupdate.img

Copy the image to the usb thumdrive

$ sudo dd if=biosupdate.img of=/dev/<your_usb_disk> bs=512K

Reboot

Choose Update system program and follow the instructions.

After upgrading, we can verify the version in BIOS. (UEFI: 1.39 / ECP: 1.24)

Reference:

• The Floccinaucinihilipilification Homepage - The Floccinaucinihilipilification Blog - Updating the BIOS of a Thinkpad X220 using Linux