Refresh rate problem

Hi,

Is there someone who can explain me how to deal with my problem ?

I have a Samsung UE55H6200 connected over my DENON AVR-2200 and my ZOTAC HTPC (with Windows 7 and Intel HD Graphic)

Refresh rate under Windows is 50hz with 1920×1080

When i launch a video (SD or HD) :
when there is a travelling in the sequence, i can a an horizontal line in the middle of the video. The video is not smooth only in the center of the screen.

I tryed to change video decompression (hardware, software render), i tryed different kind of render like bicubic, etc… and the only difference is that, instead of having the line in the middle of the screen, the line is in the 1/3 upper screen

===> this is not pleasant when watching a video

I give a try with “change refresh rate to match the video” option.

With this option, video SD / HD are good , but, when i launch a video, the screen become black for few second (time needed to change the refresh rate)
==> not pleasant too
==> live streaming from HDHR is weird, video show strange decompression

I tryed to put the option Always, but no changes….

I also tryed to change refresh rate under windows, but no changes…

I don’t understand how i could solve my problem. Does anybody has an explanation ?

I can provide log, but witch log are needed ?

Thanks Smile