Adapter worked flawlessly for 4 weeks with old PS / 2 keyboard, the keyboard was not recognized. On closer inspection, I discovered that the centerpiece of the adapter is not properly zugeclippst on the side USB side and thus no relief was available. Sequence was then one (or more) demolished wire, cable sat loose and ran to turn easily into the adapter ...
Update: Thanks for the perfect execution of the merchant "lets-sell!".
