Audio Issues, dxgkrnl.sys & USBPORT.sys have very high latency (Win7 x86, SP1)

NX37

New member
Joined
Jul 9, 2014
Posts
4
Hello,

I'm having huge sound issues when playing two specific games on my PC: Bioshock: Infinite and Civilization 5. The sound will start cracking and dropping out after a while of playing. In Bioshock this will normally start to happen after about 5 minutes into the game, in CIV it will take an hour of playing and will only appear when I start to zoom out very far from the map. The graphics are not affected though, they will continue running smoothly.

So I ran LatencyMon to see if there were some Latency issues. And the first thing that caught my attention was the USB 3.0 drivers having a very high "highest execution time" - it was about 17.5ms. After some googling I figured could be because I plugged my external audio interface (a Komplete Audio 6) into one of the two USB 3.0 slots my PC has, as appearently the USB 3.0 drivers seem to cause many issues on Win7 systems. So I deactivated the drivers in my device manager and plugged the interface into an USB 2.0 slot.

After retrying to play Bioshock, the same cracking issues started to appear, but slightly less. This time, my LatencyMon showed the USB 2.0 drivers having huge execution times. After a while of further playing, the latencies for dxgkrnl.sys and afd.sys went up too (screen attached).
Also, the driver console of my audio interface will show several "USB I/O Errors" after the cracking appeared.

lamon02.jpglamon01.jpg

When I play the game on my TV, sending the audio through HDMI to my AV-receiver, I'm having no issues at all.

I updated my graphics card drivers and the audio interface drivers and turned of power saving for all USB slots, but still no change.

Do you have any idea what else I could try?

Here are my specs:

Win7 x86 SP1
NVidia Geforce 760
Komplete Audio 6
 
Re: Audio Issues, dxgkrnl.sys & USBPORT.sys have very high latency (Win7 x86, SP1)

Have you tried updating the driver for your Komplete Audio 6 device?

There's been a lot of issues with the External interface your using, you might want to check this out:

Pops and clicks on a Windows 7 64 bit system | NI Support Forum

I'm not too familiar with such devices but it sounds like a driver issue, try some of the solutions, it varies from machine so a solution posted there might work.
 
Re: Audio Issues, dxgkrnl.sys & USBPORT.sys have very high latency (Win7 x86, SP1)

Hey Jared, thanks for the reply.

I know that thread well, I tried almost everything that's been suggested in there with no success before coming here. But, as the thread suggests, it may just be a driver issue that Native Instruments refuses to fix.

I just thought you guys might have another idea what I could try. :)
 
Re: Audio Issues, dxgkrnl.sys & USBPORT.sys have very high latency (Win7 x86, SP1)

Update:

I just unplugged my audio interface completely and put the sound through the HDMI output of my graphics card to my av receiver, so that now only my mouse and keyboard were plugged into any USB slots.
I restarted the PC and tried Bioshock again, and oddly, I get the same results: After some time, the USBPORT.SYS driver will suddenly start to get execution times of 17ms, then other drivers will follow with basically the same amount. So it seems it may not be an issue of the audio interface after all.

lamon03.jpg

What's also weird is, the highest execution time will always be at pretty exactly 17ms. Not more or less. And this goes for all drivers that follow up on the USBPOST.SYS.

Can anybody make sense of that?
 
Re: Audio Issues, dxgkrnl.sys & USBPORT.sys have very high latency (Win7 x86, SP1)

Hmm, I'm scratching my head at this one...
 
Re: Audio Issues, dxgkrnl.sys & USBPORT.sys have very high latency (Win7 x86, SP1)

Is there any further information I could provide you with to help?
 

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