Question on VGA BIOS extraction

[Iru Cai]

Hi,

I'm trying to build Coreboot for ThinkPad X220. I first backup the vendor
BIOS, then use UEFITool to extract a VBIOS. The romheader program detects
the ROM's PCI data structure and reports the device id is 8086:0106, but
the VGA controller's device id is 8086:0126. I extracted the video ROM from
a running X220 memory and use romheader to test it, the result is still
8086:0106. How could this happen?

Iru