Out of the box, to conserve power, the new Raspberry Pi Compute Module 4 doesn't enable its built-in USB 2.0 ports.
You might notice that if you plug something into one of the USB 2 ports on the IO Board and don't see it using
lsusb -t. In fact, you see nothing, by default, if you run
To enable the USB 2.0 ports on the Compute Module 4, you need to edit the boot config file (
/boot/config.txt) and add:
Then reboot the Pi. Now you should be able to use the built-in USB 2.0 ports!