coreboot

Hi,

my Thinkpad T410i is driving me crazy.
I've tried almost anything to get this laptop running in the last few days but it won't.

The current symptoms are, regardless what i am doing:

1. Power On
2. The laptop starts itself
3. The CPU fan is starting to rotate for a few seconds
4. The power button is starting to stay green (ON)
5. The display LED at the display is going on for 1 second
6. The light at the top of the display is going on for 1 second (light for better reading in the dark?)
7. The laptop reboots itself after approx. 30 seconds
8. The LEDs at the top of the keyboard are going on for 1 second
9. Continuing at point 3.

The display stays black.
No beep or something else.

The best is the following: the exact same symptoms are present when i'm starting the laptop WITHOUT any RAM installed!
Some of you may want to ask me if the laptop is functional in general?

Yes it is. If i'am flashing the original ROM containing the BIOS from Lenovo and everything is working absolutely normal as expected.

/* Environment */
Coreboot Version: Master from 28. Jan. 2021
SEABios Version: Master from 28. Jan. 2021
Lenovo Thinkpad T410i
Modell 2518A3G
Embedded Controller Version: 1.18
BIOS Version: 1.45 (6IET85WW)
CPU: Intel Core i5 M520
Dual Graphic Cards (Integrated Graphics Controller and NVIDIA Corporation GT218M [NVS 3100M])
RAM: 4GB 2Rx8 PC3 10600S-9-11-F3 and tried also 4GB 2Rx8 PC3 10600S-9-10-F2

00:00.0 Host bridge [0600]: Intel Corporation Core Processor DRAM Controller 8086:0044
00:01.0 PCI bridge [0604]: Intel Corporation Core Processor PCI Express x16 Root Port 8086:0045
00:02.0 VGA compatible controller [0300]: Intel Corporation Core Processor Integrated Graphics Controller 8086:0046
00:16.0 Communication controller [0780]: Intel Corporation 5 Series/3400 Series Chipset HECI Controller 8086:3b64
00:16.3 Serial controller [0700]: Intel Corporation 5 Series/3400 Series Chipset KT Controller 8086:3b67
00:19.0 Ethernet controller [0200]: Intel Corporation 82577LM Gigabit Network Connection 8086:10ea
00:1a.0 USB controller [0c03]: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller 8086:3b3c
00:1b.0 Audio device [0403]: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio 8086:3b56
00:1c.0 PCI bridge [0604]: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 8086:3b42
00:1c.3 PCI bridge [0604]: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 4 8086:3b48
00:1c.4 PCI bridge [0604]: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 5 8086:3b4a
00:1d.0 USB controller [0c03]: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller 8086:3b34
00:1e.0 PCI bridge [0604]: Intel Corporation 82801 Mobile PCI Bridge 8086:2448
00:1f.0 ISA bridge [0601]: Intel Corporation QM57 Chipset LPC Interface Controller 8086:3b07
00:1f.2 SATA controller [0106]: Intel Corporation 5 Series/3400 Series Chipset 6 port SATA AHCI Controller 8086:3b2f
00:1f.3 SMBus [0c05]: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller 8086:3b30
00:1f.6 Signal processing controller [1180]: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem 8086:3b32
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GT218M [NVS 3100M] 10de:0a6c
01:00.1 Audio device [0403]: NVIDIA Corporation High Definition Audio Controller 10de:0be3
0d:00.0 SD Host controller [0805]: Ricoh Co Ltd MMC/SD Host Controller 1180:e822
0d:00.1 System peripheral [0880]: Ricoh Co Ltd R5U2xx (R5U230 / R5U231 / R5U241) [Memory Stick Host Controller] 1180:e230
ff:00.0 Host bridge [0600]: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers 8086:2c62
ff:00.1 Host bridge [0600]: Intel Corporation Core Processor QuickPath Architecture System Address Decoder 8086:2d01
ff:02.0 Host bridge [0600]: Intel Corporation Core Processor QPI Link 0 8086:2d10
ff:02.1 Host bridge [0600]: Intel Corporation 1st Generation Core i3/5/7 Processor QPI Physical 0 8086:2d11
ff:02.2 Host bridge [0600]: Intel Corporation 1st Generation Core i3/5/7 Processor Reserved 8086:2d12
ff:02.3 Host bridge [0600]: Intel Corporation 1st Generation Core i3/5/7 Processor Reserved 8086:2d13

Build environment (again) freshly built today incl. xgcc and such.
To transfer the ROM i am using a Raspberry 3 with an Pomona Clip.

KConfig:

Tried nearly everthing:

• Board T410i and x201
• with VGA ROMS extracted via sysfs, without
• with VGA ROMS dumped from memory, without
• with microcode, without
• with several SeaBIOS versions
• restored the original BIOS and flashed only the BIOS partition via flashrom
• flashed the full 8MB ROM or partly (.BIOS)
• attached the extracted ME, GBe, Descr., detached it (loading only BIOS to flash)
• with me_cleaner, without

I'am currently out of ideads and can not simply attach a serial line for debugging :(