PC monitor screen simultaneously output to TV in DVI output on your PC

Have two DVI outputs on the PC. The first is connected via an adapter (DVI to HDMI) and HDMI cable to the monitor (HDMI input).
When I joined the second DVI output via cable (DVI to HDMI) to the TV, so I got there though a picture, but only when the PC monitor remained black. A simultaneous use of both DVI outputs did not configure themselves.

Unlike with the Incutex HDMI Splitter.
It delivers what it promises. Wired correctly, I have the monitor screen of the PC at the same time on the TV. Exactly what I wanted.

Problem: for transmitting the splitter must depend on the power.
Solution: use a wireless socket (Maclean). So I can the part on and off with a single click using the remote control.

For me the perfect solution.

Incidentally, I had tested for transmitting also the Club3D SenseVision HDMI Graphics Adapter USB 2.0 (59.44 euros). In concept, the easiest solution.
But unfortunately it did not work with me in spite of lengthy trials. Had the adapter return.