[SOLVED] Extracting video bios blob from bios update

[mithodin]

I have coreboot installed on my T430s. Recently, I upgraded my screen using the WQHD upgrade kit. Now, I need to change the video initialization from native to vga bios option rom. This needs a binary blob from the original bios (see https://www.coreboot.org/VGA_support#Ho ... video_bios). However, I have not managed to extract the actual rom from a lenovo bios update. All I found in the iso and exe is a $01D8000.FL1 and $01D8000.FL2 file, which according to google contains the rom, but compressed somehow. I have tried the phcomp.exe tool, but the resulting files still do not work with bios_extract.
Is there a reliable way to extract the rom from the firmware update package? Or, if this is not easily doable, is there a place where I can download the rom?

[jaspen-meyer]

I have coreboot installed on my T430s. Recently, I upgraded my screen using the WQHD upgrade kit. Now, I need to change the video initialization from native to vga bios option rom. This needs a binary blob from the original bios (see https://www.coreboot.org/VGA_support#Ho ... video_bios). However, I have not managed to extract the actual rom from a lenovo bios update. All I found in the iso and exe is a $01D8000.FL1 and $01D8000.FL2 file, which according to google contains the rom, but compressed somehow. I have tried the phcomp.exe tool, but the resulting files still do not work with bios_extract.
Is there a reliable way to extract the rom from the firmware update package? Or, if this is not easily doable, is there a place where I can download the rom?

There are several options listed on the page you linked to. Do you have the original lenovo rom? You likely saved this just before flashing coreboot.

[mithodin]

I tried all the ways available to me. Yes, I have a backup of the original rom, but the script failed to extract anything from it.

[mithodin]

I went through all the options again and was finally successful with extraction from the original rom. I needed to use UEFITool as described here.