nitrocaster FHDmod Forum Thread

FHD-panel is attached to eDisplayPort #3 pins of the docking port. PWM-Signal for backlight brightness is leached from LVDS (internal display connector).

Irreversible modification (milling) to the lid is needed to fit the new panel.

Official Install Guide

Lenovo Bios & a current Coreboot build will work without modification

Without a modified VBT (video bios table) or VGA-OtionROM LVDS still needs to stay active. Otherwise backlight of the FHD-panel will turn off, as soon as LVDS is turned off. This leads to a light increase in head and power consumption.

X will align panels next to each other by default. To align panels above each other to get rid unreachable desktop areas use this bash script on X startup:
The script creates a large enough framebuffer to attach an external FHD-display and positions LVDS-1 in the top left corner of the new FHD panel attached to PD-3

fhdfix.sh

#!/bin/bash
DISPLAY=:0  xrandr --fb 3840x1080 --output DP-3 --primary --size 1920x1080 --left-of LVDS-1 --output LVDS-1 --off && xrandr --output LVDS-1 --auto --mode 640x360

x230 @ coreboot

Coreboot Native Graphics Init

Coreboot Sandybridge Build Tutorial

allow txt file upload, plz!
tbd

add photo, pretty plz

Pins on both flash-chips:

Screen (furthest from you)
	     __
  MOSI  5 --|  |-- 4  GND
   CLK  6 --|  |-- 3  N/C
   N/C  7 --|  |-- 2  MISO
   VCC  8 --|__|-- 1  CS

Edge (closest to you)

4M chip is closer to display
8M chip is closer to front edge

Connect programmer to top 4M chip

#read upper 4M
sudo flashrom -p ch341a_spi -c "MX25L3206E/MX25L3208E" -r top_0.rom
sudo flashrom -p ch341a_spi -c "MX25L3206E/MX25L3208E" -r top_1.rom
md5sum top*
 
#read lower 8M
sudo flashrom -p ch341a_spi -c "MX25L6406E/MX25L6408E" -r ifdmegbe_1.rom

official docu

useful details

#prepare top 4M
dd of=top.rom bs=1M skip=8 if=coreboot.rom
 
sudo flashrom -p ch341a_spi -w top.rom -c "MX25L3206E/MX25L3208E"

write whole flash

#write lower 8M
sudo flashrom -p ch341a_spi -c "MX25L6406E/MX25L6408E" -w ifdmegbe_1.rom
 
#write upper 4M
sudo flashrom -p ch341a_spi -c "MX25L3206E/MX25L3208E" -w top.rom

add “iomem=relaxed” to kernelcommandline during boot

flash command is:

sudo flashrom -p internal --layout x230-layout.txt --image bios --write coreboot.rom

content of x230-layout.txt:

0x00000000:0x007fffff ifdmegbe
0x00800000:0x00bfffff bios