For anyone who sees this later:

Yes the whole ESP32 series requires an external 40MHZ crystal clock source, I learnt it the hard way aswell :(

should have read this while designing the PCB: https://docs.espressif.com/projects/esp-hardware-design-guidelines/en/latest/esp32/schematic-checklist.html ...

Hello MattWork ,

Did you find any solution to this since July?

Also, I'm having the same problem as you with my 7" RGB565 display, but using Arduino instead of ESP-IDF fixes the problem (not 100% of the time), also the display comes pre-flashed with the lvgl v9 demo and it works very well

In my ...

Hello I'm facing the same issue, but for me it was reliably working, but then without any changes it started timing out 100% of the time no matter what I do. Have you found any workaround or solution.

I have a esp32c3 and I'm using esp-idf

Thanks in advance.