[BUG] Marlin 2.1.3-b2 , Ender 3 V4.2.7, LCD screen freeze/ lag while printing

[RF47]

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

No, but I will test it now!

Bug Description

During printing the screen freezes and the knob does not respond, when printing is finished it works correctly again.

Bug Timeline

This bug originated after flashing Marlin 2.1.3b2

Version of Marlin Firmware

2.1.3-b2

Printer model

Creality Ender 3

Electronics

Creality v4.2.7

LCD/Controller

stock LCD Screen

Other add-ons

Custom thermistor 5 calibration (file attached)

Bed Leveling

None

Your Slicer

Orca Slicer

Host Software

SD Card (headless)

Don't forget to include

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

Additional information & file uploads

Config Marlin 2.1.3b2.zip

[Lazar0v]

It's the same with me.
GD32 MFL latest bugfix-2.1.x code

CrealityV422MFL-PRO.zip

[classicrocker883]

so try this... do you see if the screen is frozen after it has turned off? press in the knob and the screen should unfreeze. turning the knob left or right does not fix this.

I do have a fix, I will be putting a PR in time. but just to confirm, is this your situation? that the LCD is frozen only after it is turned off?

also, is this ProUI? JyersUI? CrealityUI?

[Lazar0v]

Only while printing does it freeze (slowly refresh) the display.
Ender 3 GD32 chip
BOARD_CREALITY_V422_GD32_MFL

[classicrocker883]

could be GD32 MFL related? have you tried using STM32F103RE_creality or STM32F103RE_creality_maple?
GD32 chips are identical, so it should be compatible

[ellensp]

@classicrocker883 GD32 chips are not identical to STM32, this is why the GD32 MFL build environment was created to address the differences.

[classicrocker883]

i meant the pinout is according to the datasheet. not sure if the board layout/wiring matters if its different. and while I never tried flashing one, it would be interesting to see if it takes.

@RF47 never answered the question if this is ProUI or what LCD type. but if its GD32F103 then its definitely compatible with STM32F103.

if you look at Creality CREALITY_CR4NS (GD32F303RET6) - Sold as "Creality Ender-3 V3 SE CR4NS200320C13 Motherboard", this uses STM32F1. so this is what I'm saying that STM32F1 ini env: just might work with all GD32F303 chips/boards

[RF47]

I have the stock LCD screen from the Ender 3, and the MCU is an STM32F103.
I don't know what type of UI I have; I installed the one that comes by default in Marlin's configuration.