Problem when watching HD movies on secondary screen (.mkv on TV)

[masterbrain]

Hi fellows.

I've had this issue for a while now and cannot find a solution for this.
It's mainly, whenever I watch a HD movie on my second screen, my LG 60PK250N, the picture is lags, in short words.
It's really annoying since I got good piece of hardware so that's not the problem.

Things I've tried so far:

- Reinstall Windows + Drivers
- Configure VLC to maintain the best performance
- Tried the TV as a main screen
- Installed loads of different codecs
Maysome something I forgot but nevertheless.

I tried alltho 24Hz for my secondary screen, THEN it worked for a few seconds BUT then the computer went laggy and the movies was not watchable at all.

Anyone got the same lag as I have?
It's really annoying when you trying to watch something and it lags :/

Thankful for every tip I can get.

Thanks in advance!

 

[masterbrain]

Solved to 95%

 

[Faladu]

That's a 60" Plasma, maybe the problem is your source .MKVs aren't good enough, but I am not sure, I have zero experience with Plasma TVs, my guess.