More weirdness.

I replaced the hub that kept the PC from booting with another one. That one allows the PC to boot even when the hub's power supply is connected. However, my mouse won't worked when plugged into that hub. Everything else works, but my mouse won't. If I plug the mouse into one of the USB ports on the computer itself, then it works, but it won't work when plugged into the hub, even if it is the only USB device plugged in.

On a whim I daisy-chained the old hub onto the new one, plugged the mouse into the old hub and it still wouldn't work.

???

tanstaafl.