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Windows 7: High DPC Latency caused by USBPORT.SYS

4 Days Ago   #1
Fernet

Windows 7 Home Premium x64
 
 
High DPC Latency caused by USBPORT.SYS

I've been having trouble recently with audio clicking and popping, and I've traced it to high DPC latency caused by USBPORT.SYS, mostly during periods of high CPU usage but it also just seems to worsen over time. I've tried disabling non-core drivers one by one to attempt to find the culprit of this issue to no success and I'm at a loss for what to do next. I am unfortunately not the most tech savvy past what I've already attempted, so if there's information that you need from me to help press into this issue please feel free to request it, I'm just not sure what type of information I would have to provide.


My System SpecsSystem Spec
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4 Days Ago   #2
fireberd

Windows 10 64 bit
 
 

What all do you have connected to the USB ports? Try disconnecting everything except the keyboard and mouse and then run the latency mon.

Latency mon unfortunately gives "data overload" and makes it hard for many of us to understand what its really telling us.
My System SpecsSystem Spec
4 Days Ago   #3
Fernet

Windows 7 Home Premium x64
 
 

I've actually tried that, forgot to mention it. It had little if any affect on the latency though. I have a headset, my kb/mouse, and a network adapter connected at all times. I have a USB drive as well but it stays unplugged when I'm not actively moving things to or from it.
My System SpecsSystem Spec
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4 Days Ago   #4
fireberd

Windows 10 64 bit
 
 

If you have a network adapter connected to the USB that would be a "suspect".

Wi-Fi (is that what your "network adapter") is a known cause of clicks/pops, etc in audio. There can be many potential causes but the Wi-Fi is one known cause in many systems.

I have a recording studio and if I do not disable the NIC (I have a wired Ethernet connection) I have had some pops/clicks/dropouts in audio in my recording program. Disable the NIC and the problem goes away.
My System SpecsSystem Spec
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 High DPC Latency caused by USBPORT.SYS




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