Contrebord Lenovo G505s - Build/Flash/Test

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Coreboot build on Debian Stretch Virtual Machine
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$ git clone https://review.coreboot.org/coreboot
$ cd coreboot
$ git submodule update --init --checkout

Moved my extracted option rom "vga.raw" in coreboot/

$ romheaders vga.raw
Image 1:
PCI Expansion ROM Header:
  Signature: 0x55aa (Ok)
  CPU unique data: 0x40 0xe9 0x71 0x02 0x00 0x00 0x00 0x00
                   0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
  Pointer to PCI Data Structure: 0x0224

PCI Data Structure:
  Signature: 0x50434952 'PCIR' (Ok)
  Vendor ID: 0x1002
  Device ID: 0x6663
  Vital Product Data:  0x0000
  PCI Data Structure Length: 0x0018 (24 bytes)
  PCI Data Structure Revision: 0x00
  Class Code: 0x038000 (Display controller)
  Image Length: 0x0040 blocks (32768 bytes)
  Revision Level of Code/Data: 0x0f29
  Code Type: 0x00 (Intel x86)
  Last-Image Flag: 0x80 (last image in rom)
  Reserved: 0x0000

Platform specific data for x86 compliant option rom:
  Initialization Size: 0x40 (32768 bytes)
  Entry point for INIT function: 0x277

$ make menuconfig
	Mainboard
		Mainboard vendor (Lenovo)
		Mainboard model (AMD G505s)
	Devices
		[*] Add a VGA BIOS image
		(vga.raw) VGA BIOS path and filename
		(1002,6663) VGA device PCI IDs

$ make crossgcc
$ make
Intel ACPI Component Architecture
ASL+ Optimizing Compiler version 20161222-64
Copyright (c) 2000 - 2016 Intel Corporation

coreboot toolchain v1.50 October 15th, 2017
dsdt.aml    593:  CreateDWordField(Arg3,4,CDW2)
Remark   2089 -    Object is not referenced ^  (Name [CDW2] is within a method [_OSC])

dsdt.aml    594:  CreateDWordField(Arg3,8,CDW3)
Remark   2089 -    Object is not referenced ^  (Name [CDW3] is within a method [_OSC])

dsdt.aml   1397:  Method (_CRS, 0, NotSerialized)
Remark   2120 -             ^ Control Method should be made Serialized (due to creation of named objects within)

ASL Input:     dsdt.aml - 1609 lines, 29714 bytes, 704 keywords
AML Output:    dsdt.aml - 9016 bytes, 373 named objects, 331 executable opcodes

Compilation complete. 0 Errors, 0 Warnings, 3 Remarks, 383 Optimizations, 2 Constants Folded
    IASL       build/dsdt.aml disassembled correctly.

Name                           Offset     Type           Size   Comp
cbfs master header             0x0        cbfs header        32 none
fallback/ramstage              0x80       stage          128508 none
config                         0x1f6c0    raw               162 none
revision                       0x1f7c0    raw               576 none
payload_revision               0x1fa40    raw               239 none
(empty)                        0x1fb80    null              792 none
apu/amdfw                      0x1fec0    raw              4096 none
fallback/romstage              0x20f00    stage          320172 none
cmos_layout.bin                0x6f240    cmos_layout      1164 none
pci1002,6663.rom               0x6f740    optionrom       32768 none
fallback/postcar               0x777c0    stage           13268 none
fallback/dsdt.aml              0x7ac00    raw              9016 none
fallback/payload               0x7cf80    payload         67370 none
payload_config                 0x8d700    raw              1611 none
(empty)                        0x8ddc0    null          3547352 none
s3nv                           0x3efec0   raw             32768 none
(empty)                        0x3f7f00   null            31704 none
bootblock                      0x3ffb00   bootblock         928 none

( full make output : https://ghostbin.com/paste/xwk2r )

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Flashing on Windows using a Bus Pirate :
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Bus Pirate v4 with Firmware v7 and Bootloader v4.10 - Driver v5.1.2600.0
Flashrom v0.9.6.1

I dismounted the laptop to get access to the BIOS chip and disconnected all power input to the motherboard.
Connected the bus pirate to the chip with the help of an appropriate test clip.

Bios Pin Connectors -> Bus Pirate
(1) CS -> CS
(2) DO -> MISO
(3) WP
(4) VSS -> GND
(5) DI -> MOSI
(6) CLK -> CLK
(7) HOLD
(8) VCC -> +3.3

Command Prompt in flashrom/ directory containing the coreboot.rom file :
$ flashrom -p buspirate_spi:dev=COM6,spispeed=1M -w coreboot.rom -V
Found Winbond flash chip "W25Q32.V" (4096 kB, SPI).
This chip may contain one-time programmable memory. flashrom cannot read and may never be able to write it, hence it may not be able to completely clone the contents of this chip (see man page for details.
Reading old flash chip contents... done.
Erasing and writing flash chip... Trying erase function 0...
Erase/write done.
Verifying flash... VERIFIED.
Raw bitbang mode version 1
Bus Pirate shutdown completed.


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G505s Test
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I remounted and started the laptop.
	Both front leds activate
	Webcam led blinks once during boot
	HDD is active
	Ventilator is running
	CPU heats up
	Keyboard numlock led works
	Keyboard Caps Lock led doesn't work
	USB Thumb Drive connected to the USB 2.0 port is powered up but no interractions with the system (led lights up but no blinking)
	USB Thumb Drive connected to any of the USB 3.0 ports doesn't power up (led stays off)
Tried to ssh to the debian I installed earlier on the machine, doesn't work.