Hi, I’m new,
I met Ross (ASULUG) at HeatSyncLabs party and he suggested a ThinkPad X220 because its easy for hardware and has an open source bios. He also said many people had one, so naturally that was the convincing reason I bought it. People with experience! 
I just got mine and Im wanting to install Ubuntu 18.10 from a flash drive.
F12 give me 2 options but neither is flash. However maybe I can use the PCI LAN option,
but I’m unfamiliar with how to do that. Is there an article/archive that I’ve missed that might tell me how to do that?
Or how do I fix the bios to give me the option in the bios for flash device bootup?
Here are my specs:
Lenovo ThinkPad X220 Tablet Intel i7-2620M 2.70Ghz 8GB RAM 128GB SSD
F12 gives me:
ATA HDD0: SAMSUNG SSD PM830 2.5" 7MM 128GB
PCI LAN: IBA GE Slot 00C8 v1366
I really appreciate the help,
Steve