After removing ”weston-start“ app, other apps cannot be displayed on the STM32MP257 platform

[Wjian.1]

Hi:

Recently, while developing an application on the STM32MP257, I tried to remove Weston. After removing the weston-start application, other apps could no longer be displayed. Additionally, when using modetest to check, I noticed that the CRTC section shows all zeros. Could you please help me understand the reason for this?

[mteaching]

Hello Wjian:

Could you please tell me which version of your firmware or yocto?

The detail can be seen at:

https://community.st.com/t5/stm32-mpus-products/modetest-error-on-stm32mp257f-ev1/m-p/727830

Why I always get error when I use modetest?

Best Regards