Lighting does not remain at or noted not the state ... is in the Windows application from which means you have the lighting for each up / down drive manually via the Fn + 8 and 2 Numblocktasten on / off.
After consultation with the Asus support I have received the confirmation:
"When the keyboard via PS / 2 + USB USB is connected to the behavior is as follows:
If the computer is shut down, the keyboard goes out to the state but does not notice. So the lighting needs after starting again be turned on. "
Annoying and incomprehensible that Asus has no quality controls in a way I'm not inconsiderable production error.