So I'm nearly certain this is because my soldering skills are terrible and something got fried, but I'm not a Linux expert so I wanted to check and see if there's any other possibility that anybody knows of. Basically, I'm trying to hard-wire a Buffalo USB SNES controller directly to a Raspberry Pi Zero's on-board USB solder pads / 5V power.  However, once I do this and load up Recalbox, I see the rainbow initial screen and then get the error I mention in the title before Recalbox boots and I have no controller detected: USB Device descriptor read/64, error -71 Again, probably just something I messed up in hardware, but I wanted to check - is there any software-related reason I'd be seeing this message?