[BUG] Unable to boot with any compiled commit after 2024-03-28 on the Ender 3 V2 Neo with an SKR3

[vrooze]

Did you test the latest bugfix-2.1.x code?

Yes, and the problem still exists.

Bug Description

Any commit since 2024-03-28 will not boot on my system.
They compile fine but when uploaded to the board it takes the firmware via the bootloader, renames it to firmware.cur and noting else happens.

I have bisected from the most recent commit all the way back to 1759429
This is the last commit that works correctly.

I have raised a PR with the specific changes needed in order to get the board working at #27061

Bug Timeline

2024-03-28

Expected behavior

The compiled firmware to boot and work on the board.

Actual behavior

Firmware compiles, but does not boot.

Steps to Reproduce

Apply changes from the PR mentioned in the comments.
Set the board to #define MOTHERBOARD BOARD_BTT_SKR_V3_0_EZ
Compile the STM32H723VG version
Upload to the board

Version of Marlin Firmware

bugfix-2.1.x

Printer model

Creality Ender 3 V2 Neo

Electronics

SKR 3 EZ

LCD/Controller

DACAI

Other add-ons

No response

Bed Leveling

UBL Bilinear mesh

Your Slicer

None

Host Software

OctoPrint

Don't forget to include

• A ZIP file containing your Configuration.h and Configuration_adv.h.

Additional information & file uploads

Marlin-Configs.zip

[thisiskeithb]

I have bisected from the most recent commit all the way back to 1759429
This is the last commit that works correctly.

That would make 466282f / #26928 the breaking commit.

[ellensp]

Please confirm, is this the board not talking or is it just the display not working so it seems dead. (ie do gcodes over usb to the controller work?)

[vrooze]

Please confirm, is this the board not talking or is it just the display not working so it seems dead. (ie do gcodes over usb to the controller work?)

Hi,

This is the board not working.
The usual boot sequence blinks another LED on the board. This doesn't happen and its not accessible via serial.

I could live with it only being the display not working till its fixed but alas its the whole board :(