Audio Stutters and Buzzing Caused by DPC Latency

Johnmoo, THANK YOU.

This worked perfectly, and I am back to normal.

Kudos and many thanks!

- Sal

Guys,
thank you very much for this solution, in my computer it also works :) Last some hours was really difficult for me, but now I can back to work Thank you one more time!

Greetings from Łódź, Poland

johnmoo said:

Wow. Thread was started one hour ago and helped me solve my problem with audio stutter.

I just registered here because I had exactly the same problem.
What solved the problem for me was deactivating the driver in the Device Manager.
Alas I can't tell you what the device was named, since I already uninstalled all the "Dell Support ..."-Software.
What I can tell you is, the driver was in Device Manager->System Devices and it's name stared with "Dell ..."
Might even be "Dell Diags Device Driver", as in the first post. You could always just try deactivating this driver via the Device Manager and see if this solves the problem for you (it did for me).
One question: which devices are you guys using? Mine is an Alienware 13.
Good luck everyone!

Made an account just to say thank you.


I've been dealing with this for a good 6 hours or so ... Tried every suggestion I could find, and then by chance found this thread.



You've made my night.

THANK YOU! I've spent the past several nights trying to determine why all of sudden I was experiencing huge latency spikes, resulting in drop-outs and audio buzzing. I updated all my drivers, even my Bios, and tried disabling/enabling devices via the Device Manager, all to no avail. I downloaded LatencyMon and DPC Latency checker. LatencyMon pointed to DDDriver64csa.sys as the culprit, but I was unsure what to do about it until I found this forum. I fired up the Device Manager via the Control Panel and disabled "Dell Diag Control Device" under System Devices and it worked! I was about ready to pull my hair out.

BTW, I find it interesting a number of you experienced the same exact problem at this time. The latency issue started immediately after some recent Microsoft updates. I can't confirm if the updates were the culprit. But the timing is highly suspicious.

Thank you, thank you, thank you! May the digital gods bless you.

Same as above... After restart problem still exist nevermind if Dell Diag Control Device is active or not.

Let's check here:

Buzzing/stuttering during audio playback on xps 13 9333 - Laptop Audio Forum - Laptop - Dell Community

and here

DPC Latency Issues (I think) - Dell XPS 13 - (Presumably) found the offending driver. What now? : techsupport

In last update Dell add 2 programs "dell support assist" - you should remove both of them.

Greetings from Łódź, Poland

THANK YOU SO MUCH.

This has been so amazingly annoying and NOW IT'S FIXED.

Thank you. Thank you so so so much. I registered just to say thank you.

Driver64 said:

Well, it looks like I spoke too soon. While disabling "Dell Diag Control Device" did indeed seem to solve the problem for a little bit. The problem started right back up again: drop-outs and audio buzzing. I'm at my wit's end with this crap.

I didn't work for me either. As mentioned in my previous post I had to do a system restore to before the last Microsoft patch. That did the trick. It was something in the last Microsoft patch (which includes Dell updates) that caused the issue. Let's hope the issue is fixed with the next patch release.

Just an update. I uninstalled all Dell Support software, in addition to disabling "Dell Diag Control Device" under System Devices in the Device Manager. So far, I haven't experienced any drop-outs or audio buzzing. I'll keep you posted.

Driver64 said:

Just an update. I uninstalled all Dell Support software, in addition to disabling "Dell Diag Control Device" under System Devices in the Device Manager. So far, I haven't experienced any drop-outs or audio buzzing. I'll keep you posted.

I've read all the posts and I must agree with this method.
Totally solved the problem for me.