[wdmaudiodev] removing working USB soundcards cause the System hangs
- From: FELIX TEPLITSKY <felixt@xxxxxxxxxxxx>
- To: "'wdmaudiodev@xxxxxxxxxxxxx'" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Tue, 13 Sep 2011 19:03:32 +0300
Hello
I have a very difficult problem with USB audio devices on WindowsXP.
I have many(up to 16) USB soundcards (based Micronas UAC3556b) working
simultaneously. For low latency I used the DirectKS.
When I connected the devices through USB2.0 I got the high CPU usage (up to
100%) in the DPCs of the System process. So, I disabled Enhanced USB
controller, soundcards reconnected to the
USB universal host controllers and the CPU usage went down to ~15%.
Now I have another problem.
Removing the working soundcards cause the 100% CPU usage in the System process.
The Windows hangs up.
if I connect soundcards to USB2 controller (the lower count) I can remove the
working soundcards and Windows doesn't hangs.
Pls help
Best regards
Felix Teplitsky
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