Natural Motion does not work properly via HDMI

[AndreyAv]

Hello.
Sorry for my english.
I have Philips 42PFL7606H/60.
I have connected my notebook to TV via HDMI-cable using resolution 1920x1080@60Hz. TV shows NaturalMotion option and allows to choose Maximum NaturalMotion.
But when i playing movies from notebook i see the situation like NaturalMotion iteratively works about 10 sec and does not work about 2 sec.
PC Mode is off on TV.
What should i do to make NaturalMotion works all the time?

[Philips - Thomas]

Hi

how do you see that its working for 10sec and how do you see that its not working?

Regards
Thomas

[AndreyAv]

I can differentiate high and low frame rate. When Natural Motion works i see smooth video, but when it does not work i see "jerks". Also i can compare this behavior with working of Natural Motion in AnalogTV - there it works well.

[AndreyAv]

Thomas, do Philips firmware engineers know about this problem?
I am sure that it is not issue of my multimedia content - it can be reproduced in any part of any video.