Unsolvable 23.976fps issue

hello guys

I have been trying a lot over the past few months, even with kodi 16, until I gave up.
Now I would like to go the other way around, and let you guys ask for information you may require to pinpoint the cause of this issue.

The problem: all videos stutter a little, obviously because of the 23.976 fps in all videos I have.
I just can’t get it smooth, every fast movement (e.g. fast camera movement on scenery, buildings, etc.) seems to stutter.
What I have tried is virtually everything. From settings in the OS, in kodi, the TV, the video receiver, it just does not help.

My setup is the following:

PC with:
– Kodi 17.0-RC2 Git:5c40b5c1b8 Media Center Kodi
– SteamOS 2.0, which is in detail: Linux steamos 4.1.0-0.steamos.41-amd64 #1 SMP Debian 4.1.13-0+steamos15 (2016-11-22) x86_64 GNU/Linux
– nVidia 950 GTX, with driver version 367.27
– HDMI output, connecting to:
Samsung HT-F5500 5.1 receiver, finally to TV Samsung UE42F5070
These 3 devices are connected using HDMI.

Enabling the sync-framerates in kodi (video-playback) leads to lots of screen flickering at playback start, probably due to changing refresh rates, but does not fix the problem.
I am not sure how these settings made in kodi are affecting the TV, as the signal goes to the receiver first.
Also, I have tried all settings I could think of in the receiver-menu, as well as in the TV-menu.
One issue there is for sure all the marketing blah-blah, which says to “improve the picture”, not stating what it actually does.

Assuming that this problem can be fixed, feel free to ask me every detail you may need to know (log entries, verbose output switches, etc.), I will provide anything needed to get rid of this.

thanks in advance for any help.