With powered hub, RP2040/RP2350 MCU file system becomes read only when PC turned off/on.

[b-blake]

CircuitPython version and board name

Raspberry Pi Pico and other MCUs using the RP2040/RP2350

CircuitPython 9.0.0  Beta 0   Bad
CircuitPython 9.0.0  Alpha 6  Good

Code/REPL

No REPL Information

Behavior

If using a powered USB hub:

MCU makes file system read only when Windows PC is turned off/on or rebooted

Power off/on to MCU to be able to write to MCU file system

Description

To duplicate the issue:

1. Plug the MCU into a power USB hub. Like you would do for a clock.
2. Check user interface can read and write to the MCU file system.
3. Power off the Windows PC for 10 seconds
4. Power on the Windows PC
5. Check user interface can read and write to the MCU file system
6. Reproduced bug is "Can't Write" to MCU file system File system read only

Additional information

AdaFruit Forum Topic

https://forums.adafruit.com/viewtopic.php?t=217178