Those mulit model notebook bioses often have several video configurations stored, for me it’s uclear how they decide which to use. In addition this machine has an additional Nvidia graphics chip, having it’s own firmware.
One could think of replacing all these configs stored in Vbios and GOP VBT with the ‘right’ one and see if it works, they should normally have same size. Next problem is legacy boot (VBios) or UEFI (GOP driver and GOP VBT). In addition this machine has an additional Nvidia graphics chip, having it’s own firmware.
Never got changing GOP VBT settings to work properly for an IVB notebook (just processor graphics!). In addition you’d have to flash the bios chip most probably with a programmer several times. Depending on how easily accessilble the chip is, there’s a risk of damaging the hardware during disassembling.
UBU output
Manufacturer - ASUSTeK COMPUTER INC.
Model - GL553VD
BIOS release - 5.12 04/29/2019
BIOS platform - AMI Aptio 5
[EFI Drivers - Find and Extract]
Intel RST GUID 91B4D9C1-141C-4824-8D02-3C298E36EB3F
Intel GOP SubGUID 380B6B4F-1454-41F2-A6D3-61D1333E8CB4
AMI NVMe GUID 634E8DB5-C432-43BE-A653-9CA2922CC458
Realtek Undi GUID A052357E-55A0-4CB1-8E40-5A3FABC2BDB4
Intel GOP VBT GUID EFCB9C70-8705-41EF-939D-B7818C80E60E
Intel GOP VBT GUID B3E7D3F1-D9F8-4703-ACFD-5CBCFBD3DA0D
Intel GOP VBT GUID A523895D-84FD-4DE3-AE98-4B0EEF699115
Intel GOP VBT GUID 155935DB-435B-431D-9B82-E053B2BBC4FB
Intel GOP VBT GUID D1741F57-DC1C-4197-AC37-04BCE475D683
[OROM - Find and Extract]
VBIOS in GUID 58B6E809-808B-4C26-BC0A-BFD7B770D721
VBIOS in GUID B981F167-9D2B-4CA0-82E9-63DF0E3C3BF3
VBIOS in GUID 9AECBA5E-37ED-4A37-83C7-0F73FB34B5DB
VBIOS in GUID B92571E7-739B-4B2C-B6AF-CEC02A209C86
VBIOS in GUID 9B703B6F-90B2-4E8A-A80B-932ECD1F8801
VBIOS in GUID A0327FE0-1FDA-4E5B-905D-B510C45A61D0
VBIOS in GUID A0327FE0-1FDA-4E5B-905D-B510C45A61D0
VBIOS in GUID A0327FE0-1FDA-4E5B-905D-B510C45A61D0
OROM in GUID 365C62BA-05EF-4B2E-A7F7-92C1781AF4F9
Main Menu
[Current version in BIOS file]
1 - Disk Controller
EFI Intel RST VMD Driver - 15.2.0.2740
EFI NVMe Driver present
2 - Video OnBoard
EFI GOP Driver SKL-KBL - 9.0.1056
RAW GOP VBT SKYLAKE - 209
** RAW GOP VBT SKYLAKE - 209**
** RAW GOP VBT SKYLAKE - 209**
** RAW GOP VBT SKYLAKE - 209**
** RAW GOP VBT SKYLAKE - 209**
** OROM VBIOS SKL-KBL - 1047**
** OROM VBIOS SKL-KBL - 1047**
** OROM VBIOS SKL-KBL - 1047**
** OROM VBIOS SKL-KBL - 1049**
** OROM VBIOS SKL-KBL - 1047**
** OROM VBIOS SKL-KBL - 1047**
…