Dynamic Brightness Error?

Hi all,

I use XBMC on my HTPC recently (Lenovo Q180), and am so far very satisfied with the program.

However, I have observed recently that sometimes the brightness changes during the movie.

I tried the same movie with VLC and MPC on the HTPC, and since this problem is not seen.
Therefore, I exclude the movie or the TV as a source of error.

I then tested several options in XBMC, and after I disabled hardware acceleration (DXVA2), then the error was gone.
But then the movie is jerky (is this the right word?).

Is this error known, and is there a solution for this?


Best regards,
Shadow128


PS:
Hope the translation is good to read ;-)