@Raziel
Not sure, possible it may go to sleep. I see no reason to because I take my focus away from the keyboard to the mouse for just a few moments. I do see a few 0x70000000 unknown code errors.
It also has a hub so there is always a hub connected with the keyboard. Possible this could drain too much power. The X1000 ports may not be providing enough power and not up to the job of an iMac built ten years before it when computers were more powerful.
I also tested it without mouse plugged in and it still goes dead. I really should replace I suppose since OS4 cannot handle it. But I don't know of any other keyboards where the logo keys are in the right spot.