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Windows 7: How to soundcard from entering D3

03 Feb 2010   #1

Windows 7
How to soundcard from entering D3

I have an issue I've been trying desperately to figure out for the last two months. I can't find the power management options to stop my sound card from entering D3 while the computer is running. Basically, if no sound is playing for a period of time, approximately five minutes, the sound card switches from D0 to D3 and shuts down. Unfortunately, if any speakers are plugged in they start to hum. I can observe the switch in the "Power data" section of the driver details so I know it is the problem. Here is the contents of "Power data" if they help at all.

Current power state:

Power capabilities:

Power state mappings:
S0 -> D0
S1 -> Unspecified
S2 -> Unspecified
S3 -> D3
S4 -> D3
S5 -> D3
The current state switches to D3 when the humming starts. Very annoying. There must be a way to edit the power management configuration on a per device basis but I can't seem to find any relevant information in my google searches. Any help would appreciated. Thanks.

My System SpecsSystem Spec
04 Feb 2010   #2

Windows 7 ultimate 64 bit / XP Home sp3

Please fill in your system specs so we have an idea of the hardware your referring to. Thanks. Fabe Name:  usercp 1.png
Views: 19
Size:  99.3 KB

My System SpecsSystem Spec
04 Feb 2010   #3

Windows 7

HP Pavilion Laptop 2714ca
Built in sound card: Conexant High Definition SmartAudio 221

The laptop came loaded with Windows Vista originally but I wiped it the next day and used Windows XP for the past two years. No issues. Upgraded to Windows 7 Pro about two months ago, all of the drivers work fine except the sound card going to sleep because of the power management settings.
My System SpecsSystem Spec

 How to soundcard from entering D3

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