Issues with laggy display with 24/25 Hz

[MajorTom123]

Hi,

I have a HTPC setup with a 7" Touch (FingerVU 700) and a TV, connected via HDMI to a Radeon 6450 card. When I set the TV to a refresh rate of 24 or 25 Hz, the video display on both screens becomes laggy. The mouse movements are slightly delayed, and movie playback becomes unwatchable.

For 25p content, it is a perfect solution to have the TV running at 50 Hz. However, for 24p content, 60 Hz is not so great.

When I deactivate the Touchscreen, everything is fine. Also, it seems to work better if Aero (running on Win7) is turned off, but that I can't tell for sure. However, that is not an option for me since the Multimedia features of Win7 require Aero for its full potential.

Log data is attached. Can you please have a look?