No, I didn’t try. The card works ok when plugged after the board is powered up, it’s ESP32 that fails to boot.
It simply doesn’t go as far as running sketches, it stops at boot, getting repeatedly rebooted by watchdog, and printing the flash reading error.
The only thing where flash chip and sd card are related - is on the GPIO12 pin. If the card has own pullup (I don’t really know if that’s a thing), the ESP can’t read its code from the flash.
I didn’t save the original report, and only did espefuse.py --port COM19 set_flash_voltage 3.3V.
I’ve found explanations here: <LINK_TEXT text=“https://github.com/espressif/esp-idf/tr … d#hardware”>esp-idf/examples/storage/sd_card at master · espressif/esp-idf · GitHub</LINK_TEXT>, see the “Note about GPIO2” and “Note about GPIO12”.