Network packet loss due to audio usage, Win7
I've come across a rather strange problem when testing under Windows 7. I am running all standard tests except USB, tape, and printer. I have set the network test set to fail if packet losses exceed .1%. When running the tests, the systems will fail after approx. 20 minutes with excessive network packet loss. There are two NICs in the system, and I have set Burnintest to test all NICs with each NIC pointing to a different server. If I remove just the sound tests, there is 0% network packet loss even after running for 12 hours. This same failure mode was observed on three different platforms using all different motherboards - one a 945GME, one a 965GME and the last a Q45 chipset. They all have Realtek audio chipsets, but the chips are different between them (ALC888, ALC655, etc.) At this point I was thinking that the driver might be to blame, as all these have the latest driver versions from Realtek, but there are no previously released drivers available to try. So, I instead disabled the onboard audio and installed a PCI audio card using a Crystal Media chipset using completely different drivers. The failure persists. I then removed the audio test from Burnintest, and instead played a .mp3 file with Windows media player. The failure persists. In fact, even when media player is *paused* and not playing the .mp3 file (but the file is locked), Burnintest STILL fails with packet loss. Tested both 5.3 build 1036 and 6.0 build 1017. I'm beginning to think this is a problem with Windows 7. DRM or something? Note that If I only test the MIDI function with Burnintest that the failure still occurs.
Hoping you guys have some ideas, I'm pretty much out of them.