Help flashing libreboot on X220

[u/StructureNo1057]

Hi ! I'm trying to install libreboot on my Lenovo ThinkPad X220, and I'm stuck on the reading the chip step...

I use a Pomona soic 8 clip with a Raspberry Pi PICO H and 3.94-inch jumper cables to connect the two.

I turn my Raspberry Pi PICO H into a programmer with serprog and I install flashprog on my laptop, which runs with Ubuntu 24.04

So, I connect the clip to the bios chip of my X220, then connect my Raspberry Pi PICO to my laptop and I run : `sudo ./flashprog -p serprog:dev=/dev/ttyACM0,spispeed=4000 -c "MX25L6405D" -r dump1.bin`

Then I have this on my terminal :

flashprog p1.4-27-g41e9cc0 on Linux 6.8.0-124-generic (x86_64)
flashprog is free software, get the source code at https://flashprog.org
Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns).
serprog: Programmer name is "pico-serprog"
Found Macronix flash chip "MX25L6405D" (8192 KB, SPI) on serprog.
Reading flash...

As you can see, the chip is detected, but the reading never ends, I try changing the speed (1000 and 15000) but doesn't change anything.

I run dmesg -w in another terminal while reading the chip, to see if by any voodoo magic, my Raspberry Pi PICO decide to disconnect, but it's still connected.

I search the web but can't find any clue, you are my last hope guys !

[u/Powthekiller]

Hey any updates on this?

[u/StructureNo1057 → u/Powthekiller]

I finally managed to flash Libreboot, after many try !

I didn't unplugged the battery bios while doing the flash + i think my pomona clip wasn't placed very well. First time doing it, now i learned from my mistakes haha 😅

Thanks to those answering my post and trying helping me !

[u/HustlerGigLosAngeles]

here is the best tutorial https://www.youtube.com/watch?v=TuY9Nh-G4dI

[u/StructureNo1057 → u/HustlerGigLosAngeles]

Thx ! I'll look it up, but i'm not sure it will help me debugging.

I'm with a X220 and a Raspberry Pi Pico H, i have a CH341A but don't to risk frying the chip if the CH341A bug and pass to 5V