DPC Latency/NVIDIA Graphic driver issue  

First time here, and now I really need some good advice.

I am the owner of a Sony VAIO VPCCW1S1E, and since start in January 2010 I have had some problems with crackling sound when playing audio or video. Over the last week things have gotten worse; the crackling sound won't stop. I've been reading several threads about the problem, and I realize that it's common. Obviously, I'm not alone. Some seem to get the problem solved in different ways, and others seem to struggle.

However, I've been trying some troubleshooting today by using DPC Latency Checker and atencyMon. I have found out that my graphic card NVidia GeForce GT 230M is the main problem. In LatencyMon driver file nvlddmkm.sys reaches highest execution value (>2.00), but also tcpip.sys, ndis.sys and ACPI.sys get high values (>1.00) in LatencyMon.

In DPC Latency Checker I get more red bars than green, and values are pending between 2000 and 25000um. When disabling, and also uninstalling the graphic card, the green bars will show up more frequently with values between 500-1000um. After reinstalling and upgrading NVidia things haven't get better. Actually, it seems to have gotten worse, and the crackling sound goes on. I have also upgraded BIOS, and reinstalled sound card drivers.

What to do now? Suggestions?

/Per, Sweden

I know nothing about your particular hardware, but when I have had problems with crackling sound, I was able to eliminate it by adjusting and/or reseating the cables in their connectors. I'm assuming that your audio and video work through the same HDMI connection, if not, then I don't know what to say.