Thanks for this workaround solution!
Now with Firmware 2210 on my Samsung TV UE75HU7500 it does work when FIRST changing the resolution to abovementioned 1920x1080. The screen freezes for 30 seconds after the connection was established, but then it works fine as expected.
It does NOT work when I set the resolution to 1024x768, because then the TV reboots after a while trying to negotiate the proper resolution.