Got rid of that joke.
Net loss 35€ + eBay fees + PayPal fees

May this piece of electrical waste curse someone else now.

exactly what have you got plugged into your RPi A keyboard. And now the hub in between. And a HDMI cable and power supply, obviously. And a SD card. give us links to everything http://www.getgoods.de/notebooks-tablets-und-pc-systeme/pc-systeme/hersteller/sonstige/710901/raspberry-pi-model-b-512mb-r...

I just received the USB hub with power supply. Didn't change anything at all. So let me guess. Now you want me to buy the cheapest, smallest, wired USB keyboard I can find, right? I invested 100€ in this thing and I can't even login. Is this whole project a practical joke? Like, "Hey, let's make a u...

Sure but that page doesn't have any more info than I already posted.

http://www.amazon.de/gp/product/B008XI5 ... UTF8&psc=1

There's nothing else plugged in. I tried a Microsoft Arc Keyboard and a QPAD MK-85 (disabled lighting). Those are all I have because I kind of expected the device to be able to handle at least a keyboard.
I don't have any equipment to test voltages.

I bought a "Micro-USB 5V 1200mA power supply for Raspberry Pi", but I get that "keys getting stuck" problem.
What's wrong with this one? I thought 1200 mA were way more than required.