LCD display not turning on - STM32MP135F-DK

[ChrisCrossCrash]

I just received my STM32MP135F-DK in the mail today. I was able to use STM32CubeProgrammer v2.16.0 to populate the device using the Starter Package, which I downloaded from here:

https://www.st.com/en/embedded-software/stm32mp1starter.html#st-get-software

The file I downloaded was named:

en.flash-stm32mp1-openstlinux-6-1-yocto-mickledore-mp1-v23-06-21.tar.gz

And the file that I used in the STM32CubeProgrammer to download the firmware to the device was named:

FlashLayout_sdcard_stm32mp135f-dk-optee.tsv

After downloading the firmware to the device and toggling the switches to the correct mode, I powered up the device and the display never turned on. However, I was able to open a terminal on the device through the serial connection.

Everything seems to be working fine as far as the terminal is concerned. I even managed to connect the device to my home network and SSH into it.

The LCD display shows no signs of life. I've never seen the splash screen, or even a flicker out of it. There is no backlight turning on.

I tried flashing it with the Starter Package version 4.1.0 instead of 5.0.0, but I'm getting the same result.

I'd appreciate some help getting this device working. Does this sound like a hardware issue? Or perhaps the screen is defective on this device?

[Olivier GALLIEN]

Hi @ChrisCrossCrash ,

This looks indeed abnormal, seems your board is defective. 

I recommand you to contact your distributor to get a new board

Olivier 

[adamli]

I got similar issue when using Starter package on STM32MP135F-DK

after booting normally and run following script to install demo package?

 apt-get install packagegroup-x-linux-ai
 systemctl restart weston-graphical-session.service

and I still get white  LCD display shows, instead of some demo in https://wiki.st.com/stm32mpu/wiki/X-LINUX-AI_Starter_package

and here i got some red log in dmesg, but I could figure it out why

root@stm32mp1:~# dmesg
...
[    0.002966] /cpus/cpu@0 missing clock-frequency property
...
[    0.101268] Driver 'scmi-optee' was unable to register with bus_type 'tee' because the bus was not initialized.
...
[    0.375816] stm32-cpufreq stm32-cpufreq: OPP-v2 not supported
...
[    3.843204] Goodix-TS 1-005d: i2c test failed attempt 1: -6
[    3.883183] Goodix-TS 1-005d: i2c test failed attempt 2: -6
[    3.923043] Goodix-TS 1-005d: I2C communication failure: -6

[Olivier GALLIEN]

Hi @adamli ,

Can you please confirm screen was working fine prior to install x-linux-ai package ?

Thanks 

Olivier 

[adamli]

Thanks for relpy @Olivier GALLIEN ！

I'm new to this board and just bought it, could you hint me how to test my screen using another cmd or some easy way？I'm not sure it‘s working but since I just bought it and I only seen it's become full light just like the image I post

[Olivier GALLIEN]

Hi @ChrisCrossCrash ,

If the screen doesn't work properly with Starter Package out of the box it's likely and HW issue. Contact your board provider. 

Olivier