My problem was that there were problems between CEC my Sony television and my Sony Soundbar when my computer was also connected via HDMI directly to the television or the soundbar.
An attempt is made to the computer to communicate, but this is not possible because it does not support CEC and this results in problems with other devices.
Thanks to this adapter, my problem is finally solved and my system is running as it should ;-)
Hab directly or a backorder, so I hang 2 computers on my television.