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Atheros Driver Creating DPC latency spikes


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#1 loveartist

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Posted 28 November 2010 - 08:30 PM

Im trying to solve the problem of my DPC latency spikes, which cause the sound on my speakers and headphones to crackle during the spikes. I can solve the issue by disabling my wireless driver. However
I want to listen to internet radio so, that solution will not suffice. I have tried updating the driver to the latest version but its not working, although im not sure if i updated the driver the "correct" way. Any ideas
on how to fix the issue, or how to get a hold of Atheros. Let me know,

Thanks, Cody

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#2 loveartist

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Posted 29 November 2010 - 02:58 AM

i am getting fed up with trying to fix the driver. Atheros tech support is non existant, the people at aspire dont know what dpc latency is so I guess now im looking, at replacing the network adapter hardware. If anyone knows how to do this or how to figure out how to do this please let me know. I have an acer aspire 5740-6025. Thanks, Cody

#3 Platypus

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Posted 29 November 2010 - 03:18 AM

I don't know if I can offer you much hope. Seems the Atheros driver is particularly bad, but people report DPC latency problems with various WiFi chips. One person I found said they only had the problem when both WiFi and ethernet were in use - are you using wired LAN at the same time as the WiFi?

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#4 loveartist

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Posted 29 November 2010 - 03:26 AM

hmm, yes one of my computers is connected via cable from the router. Also my little brother plays xbox live every now and then, i guess ill go unplug them and see if that fixes it. Thanks :)

#5 loveartist

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Posted 29 November 2010 - 03:29 AM

hmm that didnt fix it, worth a try tho!

#6 Platypus

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Posted 29 November 2010 - 03:42 AM

The person who found that solution may have had a better WiFi to begin with, like a Broadcom perhaps.

Do you know anyone who has a USB (or maybe PC Card) WiFi adaptor you could borrow, and turn off the internal Atheros? That could confirm if an alternative is going to solve your problem.

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#7 loveartist

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Posted 29 November 2010 - 03:44 AM

tried a usb cisco linksys usb wireless adapter, still getting dcp spikes every now and then but not nearly as bad. Wonder if theres one that doesent cause any.

#8 Platypus

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Posted 29 November 2010 - 04:39 AM

Hard to say on that. Another possiblity to try could be external sound. For internet radio a basic stereo USB audio adaptor might need less CPU cycles than the onboard does.

Another possibility I guess is thread allocation - if the CPU affinity can be adjusted maybe it can operate more efficiently. I've only used one such utility myself, the Ashampoo Core Tuner:

http://www.ashampoo.com/en/aud/pin/0061/System_Utilities/Ashampoo-Core-Tuner

I expect there are other utilities with similar capability. The Ashampoo one can be trialled for free if you wish. If you do try it, the installer will offer to also install a toolbar, which which you can (and in my opinion should) decline.

Other than that, at the moment I'm out of ideas.

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#9 loveartist

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Posted 29 November 2010 - 05:20 AM

ill give that a try, thanks for your help, as far as outboard sound im using that right now, n it still has the same effect. Ill post weather the ashampoo works or not. Peace

#10 loveartist

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Posted 29 November 2010 - 05:42 AM

i tried both lowering and raising the priority to no avail, thanks again for trying <3

#11 Platypus

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Posted 29 November 2010 - 07:22 AM

Bummer. The only other thing I can think of is maybe ASIO4all will work with one or other of your audio alternatives:

http://www.asio4all.com/

If you're not already aware of it, ASIO (Audio Streaming I/O) gives very efficient audio operation that runs as a Windows Service. You can give it highest priority by choosing Adjust for best performance of Background Services in the Advanced tab of Advanced Performance in System Properties.

If ASIO4all will work in your system, maybe choosing the ASIO driver as the sound playback device will give priority to the audio and avoid the crackles.

Edited by Platypus, 29 November 2010 - 07:24 AM.

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#12 loveartist

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Posted 29 November 2010 - 10:58 AM

asio 4 all doesnt work, thanks for trying!

#13 Platypus

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Posted 30 November 2010 - 10:41 AM

That's unfortunate. Unless someone else has any suggestions, we might have hit a dead end.

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#14 loveartist

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Posted 01 December 2010 - 09:03 AM

it looks like it, i guess worst things could happen tho, lol :) thanks for your help <3




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